My computer needs to lose some weight. I know, total rookie question, but how can I figure out what is taking up so much room on my hard drive so I can get rid of it? (10.6.4) My Macbook has been running sloooow. 120GB hard drive with only 2GB remaining. If I see that little spinning pinwheel ball again I'm going to go nuts. I don't really do that much with this thing, so I'm having a hard time figuring out how it got so stuffed.

It seems like there must be some way to view a list of files by size so that I can get rid of the largest unneeded stuff first, but I can't figure out how to do it. I share the computer with my family, so it could be that there is quite a bit of stuff on there I don't realize. If I knew what was loading it up, we could all determine what should stay and what should go.

I also have a 500GB Timemachine, but...um...I'm not really sure how to put that to best use.