I Can Has Cheezburger is my new favorite site as it almost always cracks me up or puts me in a good mood. Can't go wrong with that, and there's been a couple entries lately that have had me practically bawling. Granted, like any joke, they're all immensely more hilarious if you don't have to watch or read the spoiler after the picture to figure it out.

http://icanhascheezburger.com/2008/05/05/funny-pictures-fly-u-foolz

http://icanhascheezburger.com/2007/06/02/im-in-ur-quantum-box