Snacks might sound yummy. But are they actually part of a healthy diet? Yes, says New York City dietitian Keri Gans. “Snacks are an important way to keep blood sugar steady throughout the day so you don’t get too starved and overeat at meals.” That said, you should stick to snacks that are less than 200 calories, try not to grab one more than 3 times a day and make healthy choices when you do eat between meals. Here are 20 ideas.