stay away from refined sugars, avoid anything White. Protein is your friend
Grill up some boneless chicken breast, so if you feel the need to eat something, you have them ready in the frig in a ziplock bag.
normally I just do salt, pepper, and garlic powder, but if you want some flavor, go with a dry rub, or if you prefer wet, try G.Hughes sauces
they are all sugar-free.
and like wager said, exercise, even if it's just walking, it helps