I'm pretty passionate about healthy eating and budgeting. Which means I cook a lot, and seldom eat out (for reasons of both physical and financial health). Which means I pre-prepare food and take it with me no matter where I'm going (if I'm going to be on campus all day that means I bring 3-4 containers of food... yeah, I'm that weird girl!).
Due to time and financial constraints I like to bulk cook. I plan for each meal I make to feed me around 5 servings. This conserves both time and money, and if I have the freezer space and it's a meal that lends itself well to freezing I'll make a double batch.
A website I like is budgetbytes.com. She has good, simple recipes, that will feed you several servings, and she's very $$ conscious. She uses a lot of canned/packaged stuff, but it's very easy to modify that if you'd rather use fresh. This is a good beginning website and as (if? I guess not everyone likes cooking) you get more ambitious/ find out your cooking style you can find others to replace/supplement it. I love cooking so if you want to talk recipes I would love to.
I also pre-prepare fresh veggies for snacks one day per week (cut up a couple carrots, peppers, cauliflower, etc.), and that way I have a quick and healthy snack to take with me wherever I go! I usually bring hummus along too.
During my MA I never had evening classes, but I would brings snacks to eat during my day classes. It wasn't a problem, and in a few of my classes we had a 'snack rotation' and someone was responsible for bringing food each week. It was pretty neat.