What i can say is that i have read a little about the life of Siddhartha aka popularly known to the world as Buddha. He used to go out to ask for alms and he would not take food more than that can be held in his palms. I have personally tried this way to measure the amount of food i eat and believe me it really is Enough. I dropped 10 kilos after doing this for 2 months, and now my stomach cannot take it when i over-eat.