Sometimes I like to just grab a pad of cheap dollar store drawing paper, an ink pen, a pair of headphones and my mp3 player and just scribble out heads without any pre-thought or motive and see what I come up with. Most of them are crappy ugly drawings, but sometimes you can come up with something interesting, which may lead to a whole new character or painting idea. Ya just never know where the stream of consciousness will take you.
Here's a few I scribbled out of my brain through my pencil last night.