Don Draper’s advice to Peggy Olsen in Mad Men was to think about it hard for a really long time, then don’t think about it at all. I’m pretty sure the creator of Don Draper didn’t come up with that — I suspect it’s what all creative people learn sooner or later.
For those of us working with graphics, here is some more advice, tailored to the visual medium. I think it applies to illustration as much as to design.
How To Get Unstuck, from Eric Paul Snowden