OBC Food Rules Day 53: Serve a proper portion and don't go back for seconds

You lose all control over portion control when you have second helpings.  So what is a proper portion?  There is folklore offering sensible rules of thumb based on your size.  One adage says you should never eat a portion of animal protein bigger than your fist.  Another says that you should eat no more food at a meal than would fit into into the bowl formed by your hands when cupped together.  If you are going to break the rule on seconds, at least  wait several minutes before doing it:  You may well discover that you don't really need seconds, or if you do, not as much as you thought.