TIP FOR TODAY: Snack smart. Keep high-fiber, nutritious snacks handy at all times. Choose whole-grain pretzels, low-fat air-popped popcorn, or raw nuts when you are craving something salty. Wash pieces of fruit each day so they will be easy to grab when your sweet tooth beckons. Wash and cut carrots, peppers, and raw sweet potatoes for a crunchy, guilt-free snack. For the ultimate high-fiber snack, make a customized fiber-filled trail mix using raw nuts, flavorful seeds, dried fruit, and a few extra ingredients of your own.