As someone who works a lot at a desk, I'm pretty particular about how things are set up: for me it's all about piles. I favor tall, precarious piles -- somehow a desk full of piles means productivity to me (I maintain a much smaller version of Al Gore's desk). Aside from making my own mess, I'm fascinated by what others do to create their work environments -- that's where the blog On My Desk comes in: it features guided blog posts about people's desks and workspaces. It's a form of office voyeurism for the self-employed.
Here are some random samples from the blog, featuring some designers and illustrators:
Many, many more at On My Desk.