Before A Meal
When I was a boy of eight I used to eat because I wanted to eat, and my father would rebuke me saying, "Why are you stuffing yourself?" I didn't know what he wanted from me. But later, when I had grown up a bit, I understood him. And I made myself a "fence": to decide before a meal how much to eat, and no more. Because once you started eating and your stomach expands, you can be dragged into overeating.
(Rebbe Avraham of Slonim)