When you’re craving something crunchy, opt for air-popped popcorn, plain. You can have three whole cups for under 100 calories. That’s a lot of food and it won’t derail your diet at all. Sprinkle with seasonings rather than slathering with butter, and you’ll add more flavor without all the fat. When movie time comes calling, bring out a big bowl of popcorn and munch guilt-free.