I have been dealing with horrendous creative block for a few months, for almost everything except for everyday design work. Lately though, I've been feeling more of an urge to draw and create again. It's like an itch.
In order to get around the creative block, I kind of have to sneak up on the act of creation. The more casual, the better. "La la la, not really drawing anything, nothing serious; move along, creative block monster, move along."
A sharpie on the back of an envelope is an excellent way to sneak something past it.