I think Apple invented stacks (which really are just folders that reside in the dock) just for me. No more dropping files willy-nilly on the desktop: Downloads automagically appear in one stack, and I created several other stacks for all my stuff. Now the desktop always looks tidy.
Stacks are a new feature of Leopard. I’m really happy I finally upgraded the system from Mac OS 10.3.9 to 10.5. And by the way, I upgraded the hardware, too. I won’t even call it an early Christmas present to myself because my old iBook was over four years old and there were a few things I could no longer live with in order to be able to work effectively, so I found a good new home for the iBook and bought a MacBook. :-)