There are lots of reasons for people who are overweight or obese to lose weight. To be healthier. To look better. To feel better. To have more energy. No matter what the reason, successful weight loss and healthy weight management depend on sensible goals and expectations. If you set sensible goals for yourself, chances are you'll be more likely to meet them and have a better chance of keeping the weight off.

Americans trying to lose weight have plenty of company. According to a 1995 report from the Institute of Medicine, tens of millions of Americans are dieting at any given time, spending more than $33 billion yearly on weight-reduction products, such as diet foods and drinks.