Okay, I'm over-thinking this. I'm just going to make one change and stick to it for a month. It'll be a really simple change: I'm going to drink more water. Specifically, I'm going to drink 96oz of water a day. That's 8 12-oz glasses, 6 16-oz glasses or half-liter bottles, 12 cups, 6 pints, 3 quarts, or 3/4 gallon of water. At the same time, I'm going to just not buy snack food and try not to eat stupidly. I'll cook dinners from scratch like I always do. I'll eat leftovers for lunch, or sandwiches if there aren't any. I'll have raisin bran or scrambled eggs for breakfast, depending on how I feel. Everything but the water is basically what I've been doing minus the occasional binge that has happened lately. I'll go work out if I feel like it, but for now, WATER.
Water.
That's it. Let's see how that affects my mood/energy level. Stupid food science fads come and go, but you just can't go wrong with water.