Day 5: If you're trying to control your appetite, increasing the amount of fiber you eat is definitely the way to go. High-fiber foods work to control the appetite in two ways. They make you feel faster and they slow digestion. I'm rarely hungry between meals this week. Though emotionally, I want some of my favorite snacks, I'm mostly able to stick to my game plan, thanks to feeling happily satisfied most of the time.

Because fiber-rich foods are also energy dense, meaning they offer a powerful nutritional punch for very few calories, I just get more food. I can eat an entire bowl of steamed broccoli, for instance, as a snack and barely dent my calorie allotment.