Having a thorough understanding about diets and exercise helps one to choose a safe and successful weight-loss program. How to lose weight, and how to manage ones weight, are important things to know in the weight loss sweepstakes. Knowing about low-calorie diets and low-carbohydrate diets, and understanding weight-loss and nutrition myths, can help one choose a weight loss program that is right for him or her. A healthy choice to lose weight the old fashion way, or to undergo futuristic lap band surgery, needs to be an informed decision.