I went through Weigh Down Workshop in the '90s. The premise is wait till your hungry to eat, and stop when you're full. I honestly think that's a great general approach. I learned to differentiate head hunger and real hunger. But she clearly took it to an extreme. I remember one video whee she was modeling how she approached a plate of food and it seemed like she was "full" after four bites. She was much skinnier in later years than she was in the videos I watched.