The last few days I have noticed when I'm full and so I say to myself, "What would happen if I stopped when I am full?" It is a good mantra, because it creates wonder and possibility. The strategy has worked many times over several days, so I'm happy about that. Sometimes when I stop at full, there can be a little waste. I don't like that, but sometimes it's unavoidable.
Nevermind that the real answer is "eat soon", lol.