I've developed a very interesting lunch time ritual lately. I have an hour to get out, eat, and get back and since my studio is close to my office and next door to a burrito joint, I've been adding a little lunch time art exercise to the mix. By the time I ride my bike to the burrito joint, I'm down 15 minutes. Burrito=another 15 minutes. Then, I draw for 15 minutes. Just stream of conciousness stuff. No thinking, no judging, just what comes out of my head. Sometimes very orderly, sometimes scattered. Anyway, it's fun, challenging, and really stops me from caring about the quality. Beating the clock and filling the page are all that matter. You should try it.