The act of eating and digesting food increases your metabolism and burns more fat. It also helps control hunger. Eat every three hours, using low fat snacks like fruit and vegetables, and healthy grains like low fat granola bars, whole wheat bagels or crackers. Get more sleep. Adults need at least eight hours of sleep each night to keep your energy levels high.
Most people get less than seven hours during the week.
Worry wastes precious energy. Try to deal with what is worrying you. Try to release tension daily by practising meditation, yoga and, yes, exercise. This will recharge you. Don't ignore depression.