Sorting on the desktop and everywhere in the Finder!
This applies only on Leopard. I really only use this on the desktop, but if you are using icon view, it also works everywhere in the Finder. What I really hate is when my desktop gets cluttered with files that are not sorted and in no logical order. An option that solved a part of the problem in Tiger was "Snap to grid". It would at least make sure all the icons were aligned, but it is now possible in Leopard, from the View Options, to have the files automatically sorted. Here is how:
1. Press Command - J to bring up the View Options.
2. In "Arrange By", select the way you want the files to be sorted. I chose Name and with this, each time I add a file, it snaps it to the grid and it adds it in the right alphabetical order.