Tips on How to Free Disk Space on Your PC or Server

I have noticed a lot of people on the internet having issues with their hard drives filling up "mysteriously" and they are not sure what to do to reclaim some of that disk space. I've already written a handful of articles that touch on various consumers of disk space, so I am going to bring all of them together in one place for your convenience. I will keep adding to this page as I write more articles that are along these same lines.