In which you go read
Hugh Macleod doodles on the back of business cards. He also happens to be one of the most insightful writers I've ever read about being creative. Sure you could object that I've probably only read one or two things about creativity, but I don't think that's fair. Why? Because.
Go read his book/blog/site/thing. No matter what you do, be it write, draw, sing, engineer, gripe or fabricate: it will help you. Creativity is something that is useful in all circumstances, in all fields and to all people. I most highly recommend it.