Many discount organizations cater specifically to students, such as Student Market and CoolSavings. College Club offers free e-mail and voice mail, plus a discount card, and StudentNow has a good collection of discount links. Probably the largest organization is Boston-based Student Advantage, started in 1992. You don't need your student ID card to join, but participating merchants can ask to see it when you buy. If you yearn to see foreign shores on your summer vacation, look through the low-airfare companies listed on the Student Airfare Resource Page or make your own offer on Priceline.
College is about expanding horizons, after all.