Eating on campus
I usually bring my lunch to campus. It is less expensive than buying my lunch, although it is more convenient to buy lunch. Some mornings, time flies by and I either make an unbalanced meal or simply give up.
If you are on the West Bank of the Minneapolis, around the medical sciences area, I recommend going to the Fairview Hospital. Take the elevator to the eighth floor and you will arrive at the doors of the hospital cafeteria. Their prices are reasonable compared to eating at University-contracted places, and more importantly health conscious. While you can get fried foods - their french fries are very good - they always have a nice salad bar and some sort of healthy meal set of the day.
I am slowly converting my friends and acquaintances to Fairview's cafeteria. The penthouse-like view of the city from three of four walls helps immensely.