A new paper1 suggests that paying more attention to your food as you eat it will increase the neurological activity that signals satiety and awareness of food intake, thus having a beneficial effect on limiting how much you eat. The only will power required here is to pay attention to your food as you eat. You don’t try to force yourself to limit your intake, but to increase the focus your brain has on what you’ve eaten and, with that information, your brain will regulate your intake without any effort on your part.