I haven't been able to think of anything.
All of my stuff is real petty, although together it might total up to a decent amount. Mostly food like bread, milk, things that I barely need but need a little of so they just go bad, I get pissed for wasting it. I bodyslam the hard loaf of bread on the floor, toss it, buy another, repeat. Real smart there. Oh and I always seem to buy lunch (generally crappy food) from the campus food court only to eat it, decide I'm gonna go home since I'm done with class by that time everyday, where I could've eaten the bread and milk that is about to go bad. Stupid crap like that which does add up for my jobless ass.
My dual core CPU was worth it, my 500gb hard drive was worth it, the few PC games were good, and that's really all I bought.