
The left hand exercises aim to:
Do this exercise slowly at first and gradually increase it until you notice any tension in your hand, arm or shoulder. Slow down just enough so that you can stay relaxed and do the exercise there.
On the third string put your fingers on the 5th, 6th, 7th and 8th frets and repeat the following combinations.
Do the same exercise in different positions and on different strings ensuring that the timing is spot on and that each note is as clean as all of the others.
Play the D on the 7th fret third string with your first finger and then the C two semitones down on the same string with your second finger, moving from the 7th position to the 4th. There are a number of things to note here:
Once you're comfortable with this one, and it may take a while, play the C with your third finger so that your shuffling back into the 3rd position. When you've got that down play it in the 2nd position with your little finger. You'll notice the lateral roll in the wrist more now and also the importance of keeping all of the strings equally accessible to your little finger.
The first exercise developed a clean relaxed position shift, this one takes advantage of that to get you comfortably changing position up and down the neck. In addition you'll build some muscle memory that will help you find the note with your left hand simply by referencing it proprioceptively. That is you're motor and sensory systems will remember the distances between notes so that you are less reliant on looking down at the fretboard.
So where the previous exercise used only two notes these will use scales/modes, firstly the major scale and secondly the mixolydian mode. The first one plays E major on the first string:
As well as learning the distances between notes in terms of note names you're learning how far your hand needs to move to get a change in pitch. You are developing a connection between your proprioceptive mechanisms and what you hear. This exercise builds on this aural relationship by contrasting the major sound with a mixolydian.
Play A minor pentatonic ascending in one octave from 4th string 7th fret to the 1st string 5th fret and back down again (5th position) and repeat a few times to get the sound and even rhythm into your head.
Now play the same scale but play the 5 note (E) in the 7th position and complete the scale from there to the tonic on the 2nd string 10th fret, then go back down.
If you're not familiar with the major scale (this is a great way to become familiar with it) use one you are familiar with, if you don't know any then start with the pentatonic minor. If you're not up with the pentatonic minor remember, Google is your friend.
This exercise involves playing firstly an A major and then an A Lydian dominant scale in the 9th and 14th positions. Again we're working on smooth position shifts that start with gentle rotation of a neutral shoulder and progress to very slight lateral deviation, or rolling, of the wrist.
Play a simple progression, I'm playing a 12 bar in E in the 5th and 7th positions, and at the end of every bar or 2 bars reorient your left hand by taking it right away from the neck or at least from that position. Don't look at your guitar, start with chords you're comfortable with and then try more challenging ones, different tunes etc.