If you’ve been eating fast food for years, get real about your approach: You’re probably not going to stick to an organic, gluten-free, paleo overhaul for very long. "You want to change as little as possible to create calorie deficit," says Dr. Seltzer, who insists the best way to support sustainable weight loss is to incorporate small changes into existing habits. So instead of giving up your daily BLT bagels in favor of an egg-white wrap, try ordering your sandwich on a lighter English muffin. Or say you eat a snack bar every afternoon: Swap your 300-calorie bar for a 150-calorie alternative. "Your brain will feel the same way about it, so you won’t feel deprived," he says.

getfit has been wonderful for our team over these many years. We motivate each other and compete—each week we recognize the person with the most minutes. And last year we were perfect—each member met the goal each week, one of only six teams that did that. For me, personally, it’s been especially important; my bone density has increased, which is important for someone my age. Thank you, getfit!