If you're trying to overcome hunger, it doesn't necessarily mean you can't or shouldn't put anything in your body. But if you're trying to lose weight, you don't want to eat any extra food (and you know that it's just low leptin levels messing with your sense of hunger, anyway).
Instead, fill up your empty stomach with innocuous, low-calorie or no-calorie, space-filling liquids. Some ideas for low-calorie beverages that'll help fill you up include water, tea, seltzer and diet soda. Granted, it's a temporary solution, and one you may have to keep repeating until you're within eyeshot of mealtime, but it staves off the powerful desire to eat snacks you don't really need -- and full enough that you don't think about how hungry you are.