One of those things is buying a plane ticket. As you're probably well aware, there are many sites online that purport to offer the best fares. Although you can go to each and every one of them and compare, we humbly suggest you start with the following two sites: kayak.com and studentuniverse.com. The former allows you to search with flexible dates, and will actually search other sites for you so you can compare prices. And in my experience, it will actually find fares lower than all other sites, at least of those I've tried. The latter site, meanwhile, might find you a significantly cheaper ticket just because you're a student.
Also, the New York Times has recently published an article about when the best time is to buy a plane ticket. If you haven't bought yours yet, check out the article. And this USA Today article has a great set of tips. And finally, this independenttraveler.com page has another great list of tips. So read up on what the experts have to say!
by Fedor Zarkhin