There are two things that I think help anyone control their appetite. The first is to drink lots of water. Go out and buy a Nalgene bottle and keep it with you and filled with water. The second is to have a healthy snack handy at all times and to eat a couple snacks a day. Fruit and vegetables are always good. I prefer to have some raisins and peanuts always mixed up (GORP - good ol' raisins & peanuts) in a tupperware container in my room. This allows me to grab a handful if I'm hungry. I also like peanut butter and celery (or apples).
As for the drinking, I'm not sure how much you typically drink, but if you really want to go for the same effect drink a couple shots before you leave and just drink less when you go out, and try to stick to hard alcohol.
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Rational Anarchy
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