Doodling is what I do. It's a way to make visible the randomness that's in my head - just drawing out a concept right when it comes to mind and scribbling on whatever I can find.
I'm uploading the two pages backwards so when they are all uploaded you can see them left to right. But this is page two. I worked on this at at training the other day, training days make for great art doodle days. If you want to see more I do have a tumblr account.