There are few proven ways to prolong life. The most important one is calorie restriction.  Calorie restriction is the cornerstone in anti aging. How do you reduce calorie intake? Right food and portion control!
But, it is much easier to say than to do. And also, how do we learn to stop eating when there is food is still on the plate, but you are already full? There is another easy way to do it. There are many ways to control your portion.The traditional way: do not put too much food on the plate. But how do you do it if you are alone and there is nobody to monitor you and you are hungry?
What I suggest is to plan the calorie distribution of your meal. It is very easy, follow this portion control diet meal plan carefully plan the energy rich part, like meat, and carbohydrates rich food, making sure that it is no more than 1 or 2 servings (50 ? 100 g). But the rest of the meal, which does not contain too many calories, like broccoli or bok choy, can be the largest part of the meal. And in this case if you stop eating when you are full ? OK. But, if not ? you do not need to stop, because calorie consumption would be minimal anyway. Isn?t it simple?