Does anybody know a good job search website for summer work?

[rockymountaindem]

I'm a 21 year old grad student looking for a summer job. Since I'm going away from school over the summer, I'm only going to be available for a few months. My attempts to look for professional-type jobs seem to not have worked out, probably because of my limited availability. So, I'm looking for a website where I can find and apply for jobs with, say, landscaping companies, retail stores, etc. Basically, places which will hire someone to do simple work for a few months. Places like Monster.com seem to only have long-term career opportunities, and craigslist is all cluttered with "MAKE A GAZILLION DOLLARS FROM HOME NOW!!!11!!1" ads.

Does anybody know a better place I might look online? I'd like to get a jump on this now before all the jobs are filled.