Do not suddenly start a radical diet and exercise program. If you have been over-eating, drastically reducing food intake and exercising as hard as you can, can be very risky. It can lead to serious illness. Consult your doctor before starting a program, and take it slow at the beginning. Drink lots of water to lose weight . Water keeps you feeling full so you aren’t as likely to browse on food you shouldn’t have. An often unconsidered benefit is that the energy that our body expends in bringing the temperature of the water we drink into sync with our internal temperature disposes of some of our excess calories.