What I've found, in my case, is that exercise has an effect on food intake. Sure, when I move more, I tend to be hungrier and eat more. But what's interesting, is it has an effect on what I want to eat and especially on my "cravings". It basically makes me hate "junk food", and instead want to eat meat and vegetables.

If I'm already doing this, I need to pay some attention to not overeat. But when I used to binge on crappy foods, it made an immediate and enormous difference to my waistline.