I just picked up Mike Rohde's "Sketchnote Handbook" yesterday. After reading through it last night, I almost inadvertently began using his process to brainstorm solutions to a web design problem. By golly, he's right! The action of drawing out what you're thinking actually does stimulate more ideas. I think I've found a new medium.
Thanks Gary — it's great to hear this approach it fitting your needs! Keep on going!