The best way to make the trip cheap would be to pick somewhere near you so that you can just load a bunch of your friends in the car and drive... but I don’t know where you are and that might not be an option. If you need to fly you should try StudentUniverse. I used them a couple of weeks ago to go home for my sister’s wedding. Also make sure to get a hotel room with a kitchen, so that you can do some of your own cooking. Eating out for every meal really adds up. That way you can save your money for the important stuff, i.e. booze.