2. Keep snacks out of reach
Stash snacks on the top shelf of cabinets, and keep second helpings off the table. “When you have to inconvenience yourself, it gives you pause to ask, ‘Do I really want this?’ ” says Wansink. In a Cornell University study, researchers found that when office assistants had a jar of small chocolates on their desks, they ate nine per day; when the jar was moved out of reach, they ate four.