Merlin Mann (whom I'd never heard of) did a nice talk on doing creative work at the Maximum Fun Convention recently. He gives examples about writing, but as he says, it can apply to any sort of creative work.
52 Songs, 52 Weeks is the public face of Bjart Helms' attempt to write one song each week through 2009. You can learn more about him and the project by reading the first post and looking for posts with the "about" tag.
New songs appear when I feel like it, and that's that.