Warm up and cool down with slow stretches before and after exercise. Stay hydrated by drinking water before, during, and after exercise as you can lose 1 1/2 liters of fluid per hour of exercise. Set specific, measurable goals to stay motivated whether you are a professional or amateur athlete. Eat a healthy, balanced breakfast and snacks and watch portion sizes to feel your best when working out. Wear proper clothing and equipment for your activity and check equipment regularly.