I'm a little more north/east than the rest of youse, but here's my list:
Olive Mediterranean Kitchen, Clark/Lake food court - pretty much everything is good. They've raised their prices a little, but you still get a good sandwich or plate for $7-8.
The Works, Clark/Lake food court - decent hot dog, gyros (chicken or beef/lamb) place. I'm not a fan of the Italian beef there, kind of a weird mix. Always have many sandwich/fry/drink specials.
Politos Grill, 39 N. Wells - Rotisserie chicken (1/2) with sides for about $8. Wraps, soups, also on the menu, but I've haven't had any of those - I stick to the chicken.
Macy's "Downstairs" - build-your-own salad and comfort food style cafeteria (roast chicken, mac and cheese, meatloaf). They also have a grill station, pre-made sushi, but I can't vouch for them. Cheaper and less crowded than 7 on State upstairs but not so gourmet either.
"You should eat!"