Have you ever tried zentangles? I used to love to draw, but I stopped because I was too concerned with the final product. Drawing became stressful and I started avoiding it.

Zentangle is a method of drawing structured, repetitive patterns. Repetitive = relaxation and focus. I find it's a good way to clear your head. When you look at a zentangle for the first time, it looks complicated. The whole idea behind zentangles is that you can do anything, but one step at a time. You focus on the patterns, not your preconceived idea of what the final result should be. Without an expectation in mind, it is easier to make mistakes.