Eat in the cafeteria as much as possible. Many tuition programs come with a provision for a certain number of meals that are paid for in the university's cafeteria or dining halls. While the food may not always be exactly what you are craving, it is your best bet for day to day sustenance without breaking the bank. Be wary, however, or on campus restaurants that are out shoots of national chains. They may not be included in your tuition plan, and if your university uses a card swipe system, you may find out that there are some unexpected charges on your tuition bill at the end of the semester.
Get a hot plate and a pot for your dorm room. To cook easy, cheap meals for yourself, all you need is an electric hot plate and one pot. With these two items, your cheap eats options are virtually endless. Ramen noodles are a classic staple of the poor college student, but with the addition of a dorm room refrigerator, you can make macaroni and cheese, oatmeal, grits, homemade soup and countless other stove top recipes.
Plan potluck meals with your friends. A great idea for your dorm hall is to do a once a week potluck. Everyone brings one item every week, so you're only spending money on one thing, and everyone gets to share. Put a sign up sheet in the hall at the beginning of each week with slots for everyone to sign up for the items they wish to bring. Rotate who is bringing the more expensive items, so everyone gets a chance to eat well on the cheap. It's also a great idea for study groups that meet weekly.
Have mom and dad send food staples in their care packages. Moms and dads love sending care packages to their kids who are away at school, so take advantage of their generosity and ask for them to send items that you can cook, but that also travel well. Instant soup, instant oatmeal, snack bars and dried fruit are great care package items that will help you get through the hungry week without spending any of your own money on sustenance.