Hugh (hughtrain, cartoons on a business card) MacLeod has written an interesting set of "instructions" on how to be more creative. Many of these directly contradict each other... that's because there's more than one way to be creative. I actually found the summary points more helpful than the more detailed explanations further down the page. But either way, it's a good way to get yourself thinking about thinking. Then later you can relax and not think, and good ideas will come to you. Or at least that's how it works for me.