Yet another useful utility: MainMenu
I've stumbled across it on macosx.com thread about how to easily maintain OS X installations. You know, tools like Onyx etc. MainMenu
(link to MacUpdate.com's page about it with download link etc.) is free – and definitely my new favourite among such maintenance tools. It resides in the menu bar, looks like a tool and gives you every option you might need. Handling disks, permissions etc. You'll like it, too, I hope.