Here are a few suggestions.
-Eat fewer carbs. Carbohydrates burn off quickly, which is why chinese food (mainly consisting of rice, etc) doesn't keep you filled.
-Portion out smaller meals throughout the day. Plan on eating five or six times a day, but in smaller quantities.
-You didn't want to hear this, but drink water. Not because it fills you up, but because if you don't get enough, your stomach can feel like it's hungry.
- When you do eat, make sure it's something substantial. Something like meat, or roughage that stays in your system longer.
Other than that, there's not much you can do short of stomach stapling/LAP band surgery. I hope this helps.