Just say no—everywhere. Willpower is like a muscle: Work it and you get stronger. What's key is to practice keeping yourself in check in non-food situations, too. Whether you're driving in rush hour traffic or dealing with a temperamental kid, there are challenges that require self-control. Succeed in not honking at that rude driver and you'll be better able to resist dessert at the party. - 15 Ways to Avoid Holiday Weight Gain | Health.com