I have learned, or I have sometimes learned, or I would like to learn to ask for a take-out container at the start of a meal bigger than my actual head. If I pack up tomorrow’s lunch up front, I’ll eat the right amount tonight and have a great lunch tomorrow. Otherwise, I’ll just keep eating until it’s all gone and I’m all sorry.
Jane's Lessons Learned 
There was an interesting article in AARP this month about people and a buffet. If told they are to eat a meal, they eat a lot more than if told the buffet is a snack. However, the folks to ate a “snack” then would go and have a full meal in addition, so the lesson learned it make a buffet a meal and in the end, you’ll eat less.