Our bodies were trained over millions of years to overeat and consume food wolvishly because this might be our last meal for a while. Who knows when the next woolly mammoth might stroll by our cave?
Unfortunately, in the modern world, food is practically everywhere around us. So we need to learn to NOT listen to our bodies in this one respect. Recognize that hunger (or better said, "fullness") is a lagging sensation for people. You don't actually feel full the moment you are full. Instead, you will feel full 10-20 minutes later. How remarkably unhelpful.
That's why if you actually eat until you're full, you feel awful 10-20 minutes later. (For my part, I usually have to go and lie down and close my eyes for a few minutes so I don't explode like Mr. Creosote in Monty Python's Meaning of Life).
So my two cents for this thread is this: stop eating when you are 70-80% full. Be mindful that your feelings of hunger will mislead you into eating more than you should, and that your sensations of fullness will lag to the point of uselessness. Make an active choice not to listen to these sensations.
Dan
Casual Kitchen