Some evenings it is good just to sit and sketch or doodle.  I like to just noodle around with a pencil and without trying to plan a new painting.  If we get too locked tight, always producing, producing, producing, it is easy to forget to relax and just play.

Drawing is just plain fun so drawing without a plan is a good way to relax.   It loosens the hand and mind.  Sometimes I find things I want to pursue further, but mostly this is just a way to relax.