I take a cooler with me to school (and leave it in my car, obviously) so I can eat without leaving campus or buying goods on campus. Regarding this, I'm glad I haven't sought fast and unhealthy food for the time I've been doing this. I usually take sandwiches, caesar salads, macaroni salad, dinner leftovers, and sometimes milk and breakfast goodies. Granola bars are also a part of the diet.