Most fitness and nutrition experts agree that the right way to lose weight is to aim for a safe, healthy rate of weight loss of 1 to 1½ pounds per week. Short-term dramatic weight loss is rarely healthy or sustainable over time. Modification of eating habits along with regular exercise is the most effective way to lose weight over the long term. It is also the ideal way to ensure that the weight stays off. You will likely lose weight on any diet if you eat less than 910 calories a day.