I figured out, right away, when I first started drawing Zentangles that I would need a method for keeping track of how to draw specific tangles. After a bit of experimentation, I settled on testing the pattern in a small sketch book. I could draw it once or several times, just to see if I could do it, and if I would like working with a particular design. Then, I created “step-out” cards which illustrated each step in the process.