I know, its a little early for thinking about cooling down. But I could not pass this one up. Basically the author made a form of a swamp cooler with 3 cans, a cup, and a CPU side cooler fan. I like this idea and its worth trying out myself. The power supply used thought looks a little overkill.
http://hackaday.com/?s=Desktop+Air+Conditioner+Is+Really+Cool
http://dbugslife.blogspot.com/2014/03/desktop-air-conditioning.html