Finals week is the worst for me, just because its stressful and I have less free time. You don't need to run to lose (luckily, or I'd be sol haha)! Calorie counting works well for me, because it doesn't matter what/when I eat as long as I stay under calories
I like to do easy/smallish breakfast and lunch (like toast, fruit, raw veggies) and then cook for dinner (I eat a lot of chicken, but that's just me) but that's just because I have more time in the afternoons. I guess it depends on if you're living off campus--I am, so its easy to cook healthy meals.