Removing C Drive

I'm down to 32gb of free space on my 250gb (D: system) drive, so I decided to format my C: drive (160gb) to make some more space. However, I copied a lot of files over directly when I rebuilt my computer. So it turned out that my Outlook files and most of my iTunes music was still referenced as being on the C: drive. I corrected those two problems, and then I moved all the files on the C: drive to a folder called "Crap". We'll see what else breaks.