Quite possibly one of the best books aspiring (or burned out) artists can read. It shows some simple ways to get ideas from everyday life.
Plus, there aren't a lot of words, so this is a 20-minute read at best. But it's the kind of thing you'd pay to see at a college, or hear at a business seminar that would have a >$250 cover charge. And it's like $11.
I recommend this to everyone. Even you.