Tip - know what normal size serving is: meat or fish should be around size of deck of cards

know how much food a normal size serving is: meat or fish should be about the size of deck of cards. A serving of almost everything else ought to fit in the palm of your hand. And most importantly, if you feel full, do not make yourself eat up everything you have left on your plate. Listen to your body and you will know when it's the right time to stop.