Old loop: I'll just have this one cookie.
Switch to... If I can't stop at one or two cookies, I shouldn't have any at all.
Here's How: We stand by the above tip that it's okay to eat your favorite foods, provided you're the type who can stop after a small amount. "One cookie could turn into 1,000 calories or more if you proceed to eat the whole bag," warns Stephen Gullo, PhD, president of the Institute for Health and Weight Sciences. He suggests that you take a step back and honestly assess how you've reacted to your favorite foods in the past. You may discover that chocolate chip cookies trigger uncontrollable cravings but one square of dark chocolate appeases your sweet tooth quite nicely.