I find this utility really handy: MainMenu
It sit's on your menubar for easy access to various Mac OS X maintenance, permissions repair, cleaning and optimization tasks. It's speedy and free.
The only thing I ever used it for was to set up constant colour profiles across all my CS apps (took all of about 5 minutes). Now thats set up, I never use the thing.
I find the OSX finder more than capable of managing my files.