I'm a grad student so I sympathize with having a crazy schedule and needing to eat on the run. One thing that helps me is to make a big batch of some sort of one-bowl meal on Sunday, then eat lunch from that all week. As long as I'm going to be in an air-conditioned building, I don't worry too much about refrigeration, at least for things like yogurt or pasta salad, or even little cups of cottage cheese (very filling!).

Pasta salad is the best to make for weekday lunches - any concoction as long as it has some veggies and a bit of protein. (Obviously this doesn't work for low-carb dieters, but they don't seem too prevalent on these boards). Recent favorites include pasta salad with tomatoes, chickpeas and feta in a lemon vinaigrette, and pasta with pesto, peas and chicken. Epicurious.com, the Foster's Market cookbook and the Barefoot Contessa cookbook are my main sources of inspiration for these kind of one-dish salad meals.

Of course, if I make too much, by the end of the week I may be sick of it, which is why I have a bowl of week-old pasta salad in my fridge that will probably have to be tossed tonight.