Slap Bass Timing Exercises – Bass Practice Diary – 8th September 2020
If you’ve been following my recent series of videos about timing exercises, then you’ll know how these work by now. You take an odd number note grouping and play those groupings as continuous 16th notes. What I didn’t mention on any of my previous videos, was that these exercises are a great way to practice slap bass. This video feature three slap bass timing exercises. And you can take this concept and develop your own exercises.
The first exercise is 16th notes played in three note groupings. The three note grouping consists of a note, G, thumped with the right hand thumb (T). A tap on the strings with the left hand, marked L.H on the notation. And finally a pull with the index finger of the right hand, which I’ve played as a dead note by muting the strings with my left hand.
The second of the three note sequence, the left hand tap, can be very soft. You don’t need to hit the strings hard, you just need to do it in time. Hitting the strings with the left hand has the effect of silencing the first note. So, even if you don’t here the tap, you will still feel the rhythm by hearing the note G go silent.
The second exercise is an extension of that idea. This time the three note grouping is made by thumb (right hand), hammer (left hand) and pluck (right hand index). And the notes are taken from a C minor pentatonic scale.
The final exercise features a five note grouping. The five notes are as follows. Thump the G and then tap with the left hand, exactly as in exercise 1. Then thump with the right hand thumb again, but this time as a dead note muted by the left hand. That’s three, the final two notes are F and G. Pluck the F on the D string and hammer onto the G on the fifth fret with your left hand.
Slap Bass 10 Minute Workout – Bass Practice Diary – 4th August 2020
This is the third 10 minute bass practice workout that I’ve released, but the first to feature slap bass techniques. There are a lot of videos on YouTube of bass players teaching and demonstrating slap techniques. They’re often fast and flashy and they almost always involve using lots of open strings. There’s nothing wrong with that, because those things are fun to play. But, in this video I’ve tried to zero in on what I think are the fundamental techniques that bass players should practice, so that they can use slap bass techniques in “real world” music situations.
What are the fundamentals of slap bass?
If you follow my Bass Practice Diary videos, then you probably know that slap bass is not my “main thing” on bass. The vast majority of what I do is played finger style, but I like to keep my slap bass chops ready for when they’re needed. This line, that I’ve written is typical of the kind of exercise that I’ll set for myself when I’m practicing slap bass.
I’ll start by asking myself the question, what do I need to be able to do in order to execute slap bass lines quickly and accurately when they’re put in front of me on a gig? Then I’ll come up with a line, like this one, that I feel tests me on the fundamental techniques that I need. So, I haven’t included any advanced techniques like double thumbing or machine gun triplets. Those are great techniques for playing slap bass solos, but I’m more interested in the fundamentals that I need to make my slap bass lines sound good.
For me, the fundamental techniques of slap bass are the thump with your thumb, the pull with your index finger, the hammer ons and pull offs with your left hand for playing legato lines and dead notes. When I’m practicing these fundamentals, I’m concentrating on trying to get my timing as well as my tone and dynamics even. So all the notes can be heard and nothing is coming out too loud.
Bass players often use compression on their slap bass lines to even out the dynamics. It’s ok to do that, but I would strongly recommend that you don’t use compression when you practice. You need to learn to control the dynamics with your hands. Using compression will subconsciously teach you that you don’t need to control the dynamics because the compression does it for you.
The 10 Minute Slap Bass Workout
If you’ve done one of my workouts before, you’ll know the format by now. I divide the 10 minutes up into four exercises, each practiced for 2 minutes (roughly). And then the last 2 minutes is for putting all four exercises together into one line. Each exercise is practiced at four different tempos, roughly 30 seconds at each tempo. The first tempo should be very slow to help get used to the notes in each new exercise. And the last tempo for each exercise should be pushing you to the edge of your comfort zone.
The last tempo should be challenging but not impossible. It’s a mistake to try and go too fast. You need to push yourself in the last 30 seconds but I think it’s a much bigger mistake to go too fast than too slow. I’ve set the tempos in this video at tempos that work for me, 40bpm, 55bpm, 70bpm and 85bpm. If those tempos don’t work for you, then do the workout in your own time at your own tempos. You only need a metronome or a drum beat, which you can find for free online.
The line is based around a jazz III-VI-II-V in the key of E major. The line itself uses hardly any open strings. I’ve done this deliberately, because it’s harder to play slap bass without using open strings. Typically, when I’ve been asked to play slap bass on gigs, I’m very rarely required to play in keys like E and A where I can use lots of open strings. It’s more often in keys like F and Bb because those are popular keys for keyboard players and horn players.
My line is in the key of E. However, I’ve chosen the chords G#m7 – G7 – F#m7 – F7. Therefore, there isn’t much opportunity to use the open strings on the root notes. However, once you’ve learned the line, you can resolve it onto an E chord, which is fun because you can then bring in the open E string. Here’s the line.
The first exercise goes like this.
I’m practicing it as a 3-beat repeating cycle. The chords at this point go from G#m7 to G7. I’ve included one dead note, which I’m playing by striking the string with my right-hand thumb while muting with my left hand. I haven’t included many dead notes, because I feel like I probably over use them when I improvise a slap bass part. I also put dead notes in instinctively on rest strokes. You can hear me doing it in the video. So feel free to improvise dead notes on any of the rests. You can play dead notes with your right hand and left hand, I usually use a combination of both.
After the dead note, there’s a hammer on from the 2nd to 4th fret on the A-string. In this exercise, I’m working on getting an even sound between the notes that I’m thumping, which are the notes on the A and E-strings. And the notes that I’m plucking on the G and D-strings.
The second exercise is this.
This is a bass fill played using a combination of hammer ons and pull offs with the left hand. While the right hand is using both index finger and thumb. It starts by plucking the 6th fret on the first string and pulling off to the 4th fret. Then the right-hand thumb plays the open string second string and the left hand hammers on the 5th fret. Then I use my thumb again to play the 2nd fret on the A-string and I hammer on to the 4th fret. Watch out for the rest on beat 1, and the goal is to make it sound like one smooth line.
Exercise 3 goes like this.
Each note in this exercise is articulated using either the thumb or index finger on the right hand, with no written dead notes or legato phrasing. You can improvise dead notes on the rests. It’s a 3-beat cycle, like exercise 1. I could play exercise 3 as a 2-beat cycle, but it flows better with the quarter note rest on the end.
This is the fourth and final exercise.
Another rest on beat 1. More combinations of thumping and plucking, hammer ons and pull offs. Good Luck!
Learn G Major On the Entire Fretboard – 10 Minute Bass Practice Workout – Bass Practice Diary – 16th June 2020
This is the second 10 minute bass practice workout that I’ve posted. This one is specifically designed to help you learn your fretboard up and down by learning the key of G major in every position. These workouts are an example of the kind of practice workout that I often give to my students. The idea is, that if you use your time efficiently, like this, then you can achieve a lot more than you might think in 10 minutes.
The idea is that you practice each line for 2 minutes (roughly) and then the final 2 minutes is for playing the entire example all together. Each line contains all of the notes in the key of G major in a particular area of the fretboard. For example, the first line covers all of the notes between the open strings and the 4th fret. The second line covers the 5th fret to the 9th fret, and so it goes on up the fretboard until, at the end, I’ve played every possible note in the key of G major on my 20 fret fretboard in every possible position .
Each 2 minute section of the workout is divided into four tempos, with approximately 30 seconds spent on each tempo. I like to start at a very comfortable (meaning slow) tempo. And then work up to a tempo that challenges me. In this workout, I haven’t pushed the tempo up as high as I did previously. The reason is because my main goal here is to learn the notes and positions for G major. Speed is not necessary to achieve that. However I have still increased the tempo because there’s no harm in pushing my technique at the same time as learning my fretboard.
Learning Your Bass Fretboard
Learning the notes of every key all over your fretboard is huge. It will make a massive difference to your playing. It probably makes most sense to start with C major, but it doesn’t really matter which order you learn the keys in. You can think of this as learning modes as well as keys. When you’re learning the key go G major, you’re also learning A dorian, B phrygian, C lydian, D mixolydian, E aeolian and F# locrian. It helps if you can practice playing the notes against some kind of harmony, which is why I recorded some diatonic chords in the key of G major to go along with the workout.
10 Minute Bass Fretboard Workout – Play Along With Me – Bass Practice Diary – 12th May 2020
This week I’m posting a 10 minute bass practice workout that I prepared. You can join me by playing along with the video or you can do it at your own pace. Having done a video a few weeks ago talking about “how you should practice rather than what you should practice”. I wanted to post a practical demonstration of what I think is a really efficient method of practicing.
First I came up with a line which goes like this.
When I was writing the line, I was trying to come up with four bars in which each bar tested something different. But all four bars put together still needed to play like a musical phrase. I wanted the finished line to involve moving both horizontally and vertically on the neck. Meaning position shifting up and down the neck as well as moving across the four strings.
The complete workout involves practicing each bar for two minutes. Then the final two minutes is spent practicing all four bars together. Each two minute section of the workout is divided into four tempos. Roughly 30 seconds each at 60, 90, 120 & 150 beats per minute.
Obviously, if you do this workout on your own, you can customise those tempos to suit you. The principle you should follow is that the first tempo should feel slow, and the last tempo should feel fast. You want to start by practicing really slowly, there’s no such thing as “too easy” at this point. There are many really important reasons why you should start at a slow speed. You want to use this time to really think about your timing, your technique, the tone and quality of each note you play, your fingering. And most importantly, you’re starting to build up some vital muscle memory which you’ll need when the tempo gets quicker.
The last 30 seconds of each two minute section is where you should be really pushing yourself. You want to be making mistakes at this point. If you’re not making mistakes at the fastest tempo, then your practice is too easy. It’s really important to get the tempos right for you. If you make the practice too easy, you won’t be improving as quickly as you could be. If you make the practice too hard you might not improve at all.
Having said that, my advice is to be cautious the first time you do it and make it easy by setting the tempos slower. If it’s too easy the first time you try it, you can always push the tempos up the second time you do it. However, if you start out too fast, you probably won’t achieve anything.
Four Finger Exercise
The first bar represents one of the most fundamental types of technical exercise on bass guitar. Four finger exercises, or what I call “one finger per fret”. These types of exercise are typically done on one string at a time. So I’ve added the additional element of taking the exercise across the strings and back again.
The second bar adds the element of position shifting up the neck. The bar starts in the 3rd position (meaning 1st finger on the 3rd fret) and then it moves up to 5th and then 6th position.
Bar 3 is a triad pair. I’ve done videos about them already this year. Funnily enough, I wasn’t even thinking about triad pairs when I came up with the line in my head. When I wrote it down, I realised that it was a Bb minor triad and a C major triad. It just goes to show that when you practice an idea enough, it will start to become instinctive.
Single String Exercise
The final bar is a single string exercise. I’m using it to practice shifting position up the first string by shifting between my index finger and little finger.
What Should You Do if Your Fingers Hurt?
They probably will. There’s a reason that I’ve called this a workout. Playing the bass is like going to the gym for your fingers. When we’re practicing, we’re developing muscles in our hands, and discomfort will happen. When it does, it’s important to know what to do because over practicing can lead to injuries.
This fretboard workout involves a lot of work for your left hand, particularly your little finger, which might not be used to this much work. If your fingers are feeling very sore 24-48 hours after doing the workout, don’t panic. In the fitness world, there is a thing called DOMS (delayed onset muscle soreness). It happens when you work a muscle that isn’t yet conditioned to the work you’re requiring it to do. It’s usually at it’s worst 24-48 hours after a workout and it isn’t an injury, it will get better after 2-3 days.
If you experience this, it is important to take a break from intense practice, to help the muscles recover. When the soreness feels better, do the workout again. That way you will start to build the strength in your fingers. The DOMS will not be anywhere near as bad after the second time.
Don’t make the mistake of thinking “it hurt so I’m not going to do it again”. If you practice regularly, it will hurt less and less as your hands get stronger. If you take a break from practicing and then start again, the DOMS will probably come back again because you will have lost some of the conditioning you built up.
5 Tips for Better Bass Practice – Bass Practice Diary – 17th March 2020
To celebrate my 100th Bass Practice Diary video I’m sharing 5 tips for better bass practice. All of my videos up until now have dealt with ideas that you can practice, or gear advice and suggestions, or performances of things I’ve been practicing. However, I’ve never dealt with the most fundamental aspect of practice, how you should be practicing. I think lots of musicians have misguided ideas of what practice should be, I know that I did for a long time. So, I made this video to try and share with you some of the conclusions that I’ve come to about how to make the most out of your practice time.
Tip 1 – Make Your Practice Easy Not Hard
One of the mistakes I made, and I see a lot of my students doing the same thing, is to think that practice should be about pushing yourself to play difficult things that you can’t already play. It’s not bad to want to play difficult things. But you’ll achieve your targets much quicker if you start by practicing things you can already do. Then you can gradually make them harder in an incremental way.
I can remember repeatedly driving myself to the point of frustration as a teenager by practicing things over and over and still not getting them right. Now that never happens, because when I’m trying to learn something difficult, I start by breaking it down into simple easy exercises which I then gradually build up to the full thing that I’m trying to learn. If at any point I get stuck, I change what I’m practicing by making it easier. Easier could mean slower or breaking it down into smaller chunks.
I would also recommend practicing in time, either with a slow drum beat or metronome. It has the double benefit of helping you keep in time, but it also stops you from practicing something faster than you can manage.
Tip 2 – Try to Get as Much Variety as Possible
Another mistake that I made as a kid was practicing the same things over and over again until I became bored and frustrated. And while this approach can yield results, it’s not the best way to become a rounded musician, or to find enjoyment in playing music. I started my Bass Practice Diary to show that there are so many different things to practice. You shouldn’t ever be in the situation where you sit down with a musical instrument and think, “I don’t know what to practice”.
There are so many different things that you could be practicing that the problem should be, “I don’t know how to decide what to practice because there’s so much”.
The answer to that problem is to set yourself longer term goals, and then come up with exercises that will help you achieve those goals over time. Then don’t practice any one exercise for too long. Practice each exercise for a couple of minutes each and then keep coming back to them and changing them and building on what you’ve already done. Repetition is important, but you don’t need to do all your repetitions in one practice, you can spread them over weeks and months.
Tip 3 – Play for Fun
This one may seem obvious, because it’s something that we all do. But I’ve noticed that sometimes my students are apologetic about doing it. It’s like they think that all practice should be about practicing scales or learning repertoire or absorbing complex harmonic ideas. There’s only so much information a human brain can take in in one go. If you keep trying to learn new stuff for hours and hours you won’t retain most of what you’re practicing.
A lot of the time when I’m playing my bass at home, I’m just playing for the shear love of playing music. I’m not setting myself any targets or exercises, I’m just playing because I enjoy doing it. And if that wasn’t the case, I just don’t think I’d be a musician. And that leads me neatly on to my next tip which is…
Tip 4 – Play Your Instrument Every Day
If you make a habit out of playing your instrument every day you will almost certainly get good at it. I’ve never made a conscious decision to play every day, but I know that on the very rare days when I don’t play a bass, I feel like something is missing. It’s almost impossible to not be good at something that you do every day. My advice is to pick up your instrument every day, even if it’s only for a really short time and even if it feels like it hasn’t achieved anything.
Tip 5 – Love Music and Listen to Music
This may seem obvious, but it always amazes me how many people seem to miss this. I regularly ask my students “what have you been listening to this week?” Honestly, for me that’s a more important question than “what have you been practicing this week?”
It’s amazing how often it turns out that people haven’t consciously listened to any music all week. In this day and age, it’s normal for musicians to practice and to watch Youtube videos about our instruments, but we don’t always make time to listen to the music we love.
Loving music means listening to music and I firmly believe that you learn as much (if not more) from listening to music as you do from playing your instrument. So my fifth, but most important tip, is to make time to listen to music, really listen to it, don’t just have it on while you’re doing something else.
Nothing inspires me to make music more than listening to music. And I know that everyone has busy lives, but if you’re planning to do an hour bass practice tomorrow, I would suggest spending 30 minutes listening and 30 minutes playing. It doesn’t necessarily matter what music you listen to, but I would point you back to Tip 2 and suggest that variety is equally important in the music you listen to as well as in your practice time.
Augmented & Whole Tone Symmetrical Jazz Bass Exercises – Bass Practice Diary – 9th July 2019
This week I’ve been practising symmetrical jazz bass exercises. Symmetrical means anything that uses the same repeating intervals over and over. For example diminished chords are symmetrical because they use only intervals of a minor 3rd. And in this video I’m using augmented triads (major 3rds) and the whole tone scale (major 2nds).
Why practice symmetrical exercises?
I was first turned onto the idea of practicing symmetrical exercises years ago when I first ready Ray Brown’s Bass Method. For those of you who don’t know, Ray Brown was a pioneering jazz upright bass player. And he is famed as an innovator of using the upright bass for playing bop style bass solos. So his book gives a great insight into how he thinks.
But he doesn’t use a lot of words, it’s mostly just exercises and there are many of them. There are pages and pages of symmetrical exercises and all he tells us is that we should practice them alongside scales because they’re extremely useful for playing jazz vocabulary. But he doesn’t explain why, and it took me a while to fully appreciate just how useful these exercises are.
First of all, the fact that these exercises are symmetrical means that they work over a number of different chords, not just one. In the video I’m using dominant 7th chords as an example. If you use an exercise to harmonise a dominant 7th chord. And every interval in the exercise is the same. Then logically you can use the same exercise to harmonise different dominant 7th chords starting with a root note on every single note in the exercise.
The augmented/whole tone exercise
The exercise in the video is built around the whole tone scale starting and finishing on C. It has six notes in it, C, D, E, F#, Ab and Bb. And the six notes are harmonised into two augmented triads, C, E & Ab and D, F# & Bb. These notes can be used to harmonise the following dominant 7th chords. C7, D7, E7, F#7/Gb7, G#7/Ab7 and A#7/Bb7. The scale will create the intervals root, 9th, maj 3rd, #11th, b13th and dominant 7th. Three chord tones (R, 3rd, 7th), one unaltered extension (9th) and two altered extensions (#11, b13).
Bass Practice Diary is One Year Old – 23rd April 2019
A year ago I decided to start documenting my bass practice by picking one thing that I was working each week and making a short video about it.
As a music teacher, I believe that if you want to keep improving your musicianship, then it’s essential that you keep finding new things to practice. It seems to me that a lot of people get stuck in the same practice routines, practicing the same things. And then they wonder why their playing isn’t progressing in the way that they want it to.
What I’m trying to show, is that there is an almost unlimited number of different things to practice. And many different ways that you can practice them.
I release the videos every Tuesday. And I haven’t missed a week in the whole year. So there are currently over 50 videos. All available for free without subscription.
If you would like to follow my free videos each week then you can always find them here on JohnnyCoxMusic.com. And if you subscribe to my Youtube channel and click on the bell icon, then you should be alerted each week when my videos are uploaded. You can also follow me on my Facebook page Johnny Cox Music. And you can find me on Instagram @johnny.cox.music
The term artificial harmonics relates to various techniques where you use your right hand alone to play the harmonics. Artificial harmonics are more difficult to achieve than natural harmonics because you need to do two things at the same time with your right hand. In this post I’m going to look at three different techniques.
The Jaco Pastorius Technique
Many bass players, myself included, discovered artificial harmonics through listening to Jaco Pastorius. I remember as a teenager listening to Weather Report’s tune Birdland and wondering how the introduction could possibly be played on a bass. I was already familiar with natural harmonics. But Jaco seemed to be playing melodies and bending notes with the fluency of a guitar player.
The secret was, that he was using his right-hand thumb to touch the strings lightly, while his right-hand fingers were plucking the notes. And, at the same time, he was fretting notes with his left hand and imitating the phrasing of a guitarist bending strings by sliding the notes on his fretless bass. A lot of things going on at the same time!
It was Jaco’s technique that I was trying to copy when I first started playing artificial harmonics. But that was only until I found a technique which I found worked much better for me and the way I wanted to play. I haven’t used the Jaco technique in well over 10 years now.
The Steve Bailey Technique
After hearing Jaco, the first time that I saw a bass player doing something significantly different with artificial harmonics was on a DVD called Bass Extremes Live.
I’m sure many of you are already familiar with Victor Wooten and Steve Bailey’s incredible bass duets. But at the time I first saw that film, I knew all about Victor Wooten, but I didn’t know Steve Bailey.
Steve Bailey was making incredible arrangements using artificial harmonics on a six string fretless bass. He was playing chords using bass notes and harmonics played simultaneously, which seemed impossible, even to someone who was already well familiar with Jaco Pastorius’ repertoire.
The Steve Bailey technique involves straightening your index finger on your right hand. And using it to lightly touch the string. Then you can use your third finger to pluck the string at the same time. Meanwhile, your right-hand thumb can be used to play bass notes.
Once I’d learned this technique I never went back to the Jaco technique. Because I found that I could play everything that I was doing before with the Steve Bailey technique but I could also play chords using artificial harmonics. I don’t want to get into a debate about which technique is better or worse. We’re all individuals and Jaco’s technique worked for Jaco and Steve Bailey’s technique works for him. And personally I’ve found that Steve Bailey’s technique works for me as well.
My Own Experiments with Artificial Harmonics
Recently I made a video which I called Improvisation on Three Basses. The idea for that video came because I was playing the chords of Miles Davis’ tune Flamenco Sketches using an artificial harmonics technique that I’ve seen used by guitarists like Ted Greene and Tommy Emmanuel. But I’ve never seen it used by a bass player.
I was wondering if I could adapt it to playing chords on a bass guitar. So I tried out playing one of my favourite chord progressions. I was amazed by how well it worked. And it led me to wonder why I haven’t seen it done before.
The technique involves using your index finger to touch the string. Then plucking the same string with your thumb and then using your third finger to play notes on other strings.
Here is the exercise that I wrote and played in the video using this technique.
This is an extended version of the same idea. It uses a chord progression that starts with an Emaj7#11 then F#m11 and G#m11.
Hammer Ons and Pull Offs – Left Hand Technique Lesson – Bass Practice Diary – 27 November 2018
Someone asked me recently to do a video with some Hammer Ons and Pull Offs exercises. I don’t usually do videos based on suggestions, but this time I thought it was a good idea. Because practising Hammer Ons and Pull Offs is a great way to improve your Left Hand Technique.
Having said that, I believe that there are a few basic things that you need to get right if you are going to improve your technique by practicing hammer ons and pull offs.
Left Hand Techniques
The first thing is to come up with exercises that use four fingers on your left hand. If you want to play with good technique in your left hand then you need to be able to play evenly between all of your fingers.
I see so many beginner and intermediate bass players favouring certain fingers and trying to avoid other fingers on their left hand. It’s very natural to play like that because when you start, everyone has stronger index and middle fingers than ring finger and little finger. But that’s the reason you practice left hand techniques, in order to overcome that.
If you play hammer ons and pull offs using the same two fingers every time, then you are actually making your left hand technique more uneven when you practice.
So, Rule One of left hand technique is practice with four fingers. The only exception to this is when you are specifically working on strengthening a weak finger. As I demonstrated in the video with my third finger.
The second thing that you need to get right is, when you hammer on, you need to hammer on to the fret and not in between two frets. For example, if you want to play the fifth fret on the first string, you need to hammer onto the fifth fret, not in between the fourth and fifth fret.
You need to be very accurate because if you go even a little bit in front of the fret, you will lose the note. The sound is created by striking the string against the fret. So, if you don’t hammer on accurately then the sound will be weak and quiet.
Many bass players struggle with this because they don’t spread out their fingers on the left hand. If you play with your fingers too close together, you won’t be able to reach the frets with your third and fourth fingers and your hammer ons will be weak.
So, Rule Two is spread you fingers wide and hammer on accurately onto the frets.
The pull off technique is a bit easier. But make sure you don’t just lift your fingers off the strings. You need to excerpt a gentle pull on the string as you pull off. If you don’t, the notes will die out as you repeat the exercises. If you pull too hard, the notes will sound uneven as your pull offs will be much louder than your hammer ons.
When you get the pull off technique right, you should be able to keep all of these exercises going continuously without needing to play any notes with your right hand. The pull off technique is easiest to execute on the first string.
So, Rule Three is practice these exercises on all strings, not just on the first string.
The Hammer On and Pull Off Exercises with Bass TAB
This is the first exercise that I played in the video.
I would recommend that you don’t spend too much time playing the same exercise the same way. You should keep coming up with your own little variations. And try to focus on the things that you find difficult.
If you practice the same exercise too much, you will become very good at playing that one exercise. But if you keep varying the exercise you will eventually become very good at the technique, which is what you want.
Here is the second exercise from the video.
In this example you keep your first finger held down continuously. Now here is a variation in which you hold your second finger down continuously.
Make sure you hold your second finger down on a string that you’re not using. Because you won’t be able to pull off with your first finger if your second finger is held down on the string you’re playing. You can vary this exercise again by holding down your third and then fourth fingers. It gets harder each time.
Rule four is the most important rule, and it should apply to everything you practice. The rule is, focus on timing and not speed. Use a drum beat or a metronome and practice everything you do by playing in time.
Hammer ons and pull offs are relatively easy to play fast, but they’re much harder to play in time, and it’s hard to get all the notes to sound even. So my best recommendation is start slow, play in time, make it even and then gradually increase the tempo.