I have a great cookbook, The Teen Vegetarian Cook book
. It's $0.78 on amazon. It has tons of really great and healthy ideas for dorm cooking. I figured out ways to work meat in or when my budget was a little tight, I would leave it out.
I assume your college has a salad bar, one thing that you can do is get fresh produce off of there when you are cooking so that you don't have that half of onion hanging around.
Pasta dishes are fast, easy, and cheap so give some of those a try. Also, when my husband and I were in college, one thing I helped him discover was individually packed frozen chicken. You just pop one in the fridge the day before you want to make it. It cooks quickly, and is usually quicker and cheaper than getting the same thing in your cafeteria.
I assume you're cooking for one, or on the occasion two. But it is pretty easy to get good nutrition by adding things like yogurt, nuts, veggies, and fruit. They don't take up a lot of fridge/ freezer space either.
Good Luck and let us know how you make out. BTW where do you go?