Visualize Your Hard Drive

As Rick has mentioned before, one of the best ways to free up space on your hard drive is to get a birds-eye view of all the stuff you've got on there and then bulk delete the stuff you've got no use for (say, temporary internet files). I tried out Xinorbis for my PC, but was just turned on to Drivespacio by the folks over at Lifehacker. It's very fast and simple, and lets you toggle between bar graphs and pie charts when you're checking out your folders.