Are you a spoon-in-the-peanut-butter-jar kind of person? Overindulging in a food—whether it’s healthy or not—can quickly add inches to your waistline. Here’s how to enjoy three popular foods without going overboard. Peanut Butter With nearly 100 calories per tablespoon, regular peanut butter can easily pack on the pounds. Portion Control Tricks to Try: Use pre-portioned …