Most of us eat quickly, chewing each bite just a few times, which means we consume more food than we realize. Slow down and you'll slim down: In a recent study, people who chewed each bite 40 times ate almost 12 percent less than those who chewed just 15 times. When we chew longer, our bodies produce less ghrelin, a hormone that boosts appetite, and more of the peptide hormones that are believed to curb hunger. "Chewing seems to stimulate the gut to make appetite-suppressing peptide hormones," Dr. Cypess explains. Plus, the more you chew, the more thoroughly you break down food, which may release nutrients into your blood faster and give your brain time to register that you're full. From now on, focus on eating slowly at every meal. Put down your fork between bites and work your way up to 40 chews per mouthful of food.
Doing crunches until the cows come home? Stop it! When you're down to your final inches of belly fat, the dreaded crunch won't be the exercise that finally reveals your six-pack. "You can't spot reduce," Jill says. Instead, she suggests doing functional exercises that use the muscles in your core—abdominals, back, pelvic, obliques—as well as other body parts. "These exercises use more muscles, so there is a higher rate of calorie burn while you are doing them," she says. Planks are her favorite functional exercise—they activate not just your core muscles but also your arm, leg, and butt muscles.