I recently started using Hazel by NoodleSoft on my Mac at home. I have to say it is pretty damn cool. I think of Hazel as a maid, Hazel is always there ready and willing to clean up the little messes that appear around my Mac. Hazel watches folders and acts on them based on a series of rules I setup and customize. The best part is Hazel does it all in the background, it need not even be summoned, it just works.
Anyone other there use Hazel? I would love to see some of the rules you have setup. Nothing like collaborating, specially when you have so many options available in an app such as Hazel.