I want to take everything off of my hard drive from my computer and just start over new. I'm trying to find the best way to do this. Why I want to restart? I want to get rid of the files I have that I don't use anymore, but I don't know what they are. I want to get rid of old plist files that I don't new and any old application files. Now what would be the best way of going about this? I understand it's kind of broad so anything will help.