The Pull-Off
The pull-off is a technique often used in conjunction with the hammer-on. It involves the left hand finger pulling the string as it moves away from it, creating the sound of the next note. In the following example, the second A note is created by the movement of the finger as it pulls off the string. Only the first note of this group is picked.
Repeat this exercise many times over, and aim for a clear sound on each of the three notes. Remember to actually pull the string as you move your finger away, as opposed to just lifting the finger off the string.
The pull-off is indicated as such: 
The following exercise uses the hammer-on/pull-off combination on three different strings, using the second finger. Aim for a clear sound from each note, and also be to maintain the correct triplet timing.
The following chord study combines the hammer-on/pull-off technique with the 3 principle chords in the key of A.
"Auld Lang Syne" consists of four 4 bar phrases and you will notice that the 2nd and 4th phrases are identical.
* This chord is called F# diminished. You may sometimes see diminished chords written with the abbreviation "dim" or a minus sign e.g., F# dim or F# —.
