You’d love to lose 20 pounds of holiday cookie weight before anyone sees you in a bathing suit. But is a quick crash diet the way to go? The answer is, unequivocally, no. The most effective way to lose weight is a combination of regular exercise and a nutritious diet (of lean protein, whole grains and fruits and veggies in moderation). And, of course, a little patience. Here’s why you shouldn’t try those other diets, as tempting as they might seem.