I always lucked out during lunch time because one of the dining halls always offered grilled fish or grilled chicken. I would be real nice to the ladies and ask for double/triple fish or chicken, and then I'd always hit up their amazing salad bar and load up on spinach, artichoke, broc, tomatoes, some bacon bits, olive oil, etc.
Sometimes I'd be rushing for time so I'd have to go to the crappy dining hall which was closer to my classes. There, I'd go straight to deli and ask for a pound of shredded turkey, basically. The dining hall I mentioned earlier also had a really good sandwich bar, serving not just turkey but roast beef, corned beef, and bacon. They would also bake your sandwiches.
Lastly, rejoice when they have burgers. Just get like 3 burgers, toss the patties, and have yourself a triple patty cheeseburger.
Of course, if you're in luck they'll constantly serve bbq chicken, baked chicken, broiled chicken, steak, pork loins, etc, and you would get that first.