I was visiting some friends in LA today and one of the planning directors had this article from Time magazine posted on every face of his workspace. Its a review of "A Perfect Mess," a book that highlights the benefits of keeping clutter. I always tend to work better when I'm surrounded by stimuli: stacks of papers, photo collages, articles, toys, interesting nic-nacs, diagrams, etc... I find that the more I can see at one time, the easier it is to 'connect the dots.' I'm fully aware that this isn't the way everyone's mind works, but I'm glad to see that someone has written a book that promotes my thought process.
[UPDATE: I just got the book, I'll follow up with my take.]