This lesson over at ultimate-guitar.com explains why it is important that you learn to come up with your exercises to help you learn techniques or improve your skills. There will be a time when you can’t find any relevant exercises for a technique you want to develop. This lesson spells out step by step what you need to do to come up with effective exercises.
An analysis of an exercise is included to show you how you can do the same and what really makes an exercise effective.
Access the lesson here.
Although all guitarists should learn how to come up with effective exercises, this lesson is suited for intermediate to advanced players.