Healthy snacks can satisfy your hunger and keep you from eating extra helpings at your next meal, which can lower total daily calories. Snacks can also supply afternoon energy and extra nutrients. If you're trying to lose weight, try these snacks that are 100 calories or less: 1 cup sliced bananas and fresh raspberries; 2 cups carrots; 2 cups air-popped popcorn; 5 rye or pumpernickel crackers; 2 tablespoons peanuts; 2 domino-sized slices of low-fat colby or cheddar cheese.