Scott Hanselman has written a fantastic article about clearing the clutter on your disks.  It's amazing how fast hard drives fill up nowadays, especially considering how big they are.  The screenshot here is my primary disk on my main machine.  I realized that 74GB was pretty small from the start ... but I really wanted that 10,000RPM speed.  And considering I store all my actual data on other drives/machines, I figured I'd be fine.  I was wrong!  I wish I had sprung for the Raptor drive that was twice as big, but oh well, live and learn.  I'll be following Scott's guide this weekend to try and free up some space.  I wonder how much I'll come up with?