When you're in college, the struggle is real! First off, if you are not already doing something vegan, veggie, or paleo, I would suggest holding off on those until you have a plan established that works for you. Those are wonderful goals, but it takes a lot of time and effort to follow those plans when you are at the mercy of the cafeteria. Especially paleo...
What I often did for homework was take a book/audiobook (when available) to the gym, and do the stationary bike or elliptical while doing the reading. While that approach might not work with calculus, it should be okay for history! If you are at the cafeteria, opt for any types of fruit/vegetables available over pizza or sandwiches, if you can. I often did salads, but I know that can get boring quickly, so you can add fruit, meat (or black beans), and cheese (in moderation) to the salads. Basic rule of thumb if you get tired of the bunny food: Just avoid fried. In the dorm life, that's enough to take care of 50% of the problem. If the floor gets 10 pizzas, grab a slice or two, but stop after that and don't get breadsticks. Cutting out sodas (and caffeine, when you can... if you can...) helps a TON. A lot of the drink machines in dorms/cafeterias have teas that look innocent enough, but they are still loaded with high fructose corn syrup. Cutting out the sugar drinks, if you haven't already, should make a huge difference. But doing it one step at a time so you don't get overwhelmed, absurdly sleepy, and cranky will help more than any "8 steps to thin!" program.
"You can't out-run your fork!"
