Exercise is the healthiest way to lose weight, but it's hard to stick to it. If you really can't stick to it, then eat less dinner or don't eat it. Want to eat three meals, go out for a walk after breakfast and dinner and lose weight. It's best not to use diet pills. If you eat too much, it will rebound, which is not good for your health. Don't go on a diet to lose weight. Dinner is fine. Long-term dieting will lead to anorexia.