You know the kind, says Jillian: "Everyone's like: 'Give up carbs!' 'Give up fat!' 'Wait, no, now I'm taking pills!' None of them are manageable long-term—and they wreak havoc with your metabolism! Because you're either starving yourself or you're cutting out a major food group. Then you go back into weight-gain mode, but it's even worse, because your body has adjusted to all that crazy fad crap."
Yasmine Farazian, a professor at an art and design college, can thank Rania Batayneh, M.P.H., author of The One One One Diet, for the easy rule of thumb that helped her shed 50 pounds: At each meal, she made sure to eat one carbohydrate, one protein, and one fat. Finally, Yasmine had the template for making a healthy, well-balanced meal that she needed. "I would have the bun, beef patty, and avocado," she says. "And if I wanted fries, I'd ask for lettuce instead of the bread."
Eat Breakfast Every Day. One habit that's common to many people who have lost weight and kept it off is eating breakfast every day. "Many people think skipping breakfast is a great way to cut calories, but they usually end up eating more throughout the day, says Elizabeth Ward, MS, RD, author of The Pocket Idiot's Guide to the New Food Pyramids. "Studies show people who eat breakfast have lower BMIs than breakfast-skippers and perform better, whether at school or in the boardroom." Try a bowl of whole-grain cereal topped with fruit and low-fat dairy for a quick and nutritious start to your day.