What you DON'T draw is just as important.
I have been enjoying the process of silk screening for the past few years. And I love the results. But thinking in layers and using limited colors has helped with my illustrations. Another thing that has evolved in my work is the line work, or lack of. Instead of drawing everything, I try to use color shapes and negative space to create the image. Here is a nice example of that. The arm that cuts across her top is not drawn at all, besides the lines for her fingers, nothing is there except the red on either side, creating the illusion of an arm, then your mind finishes the rest. Having fewer colors and lines makes it somewhat easier, but at the same time much more difficult. Finding the right puzzle piece and placing it the right place, when there is no picture to look at, except for the one in my head.