Eat raw pasta.
I'd say buy small packs of food or buy food that increases your metabolic rate-that way it doesn't matter if you eat more of that (eg. celery..google more)
If you follow all of these steps, you'll definitely get out of the habit of stopping regularly at fast-food restaurants, and, with good discipline, you'll even be able to lose some weight. Yes, maybe you don't even want to lose weight, because all you asked is how to control how much you eat, but you'll find that this will greatly help too. Trust me, I have the same problem, and I followed these things too, and I'm managing to keep my current weight, which is cool.
I hope this helps!
You can get ritilan or adderal very easily from any high school