If I can, I go out for a walk and listen to a book on tape. If I can't, I try to find some TV shows online to watch (love Korean dramas! No commercials and you can watch a bunch of episodes at once). Sometimes coffee helps, so another vote for hot drinks. Drinking a bottle of water can help sometimes.
If that fails, I'll make a very light salad with lettuce and low cal dressing, and eat that as a snack.
Also, if it's a ton of junk food in the house, I will throw it away PRONTO. I hate to waste food, but me bingeing on it is bad, too. I am not a trash can.