Sleep is a vital part of a healthy and happy life. It is a natural process that plays a major role in the body's daily routine. Getting enough sleep so that you feel alert and well rested allows you to feel and perform your best. At times, however, your body can miss out on the quality sleep that it needs. This can have a negative effect on your mind, body and emotions. It can even put your life in danger. Preventing and treating sleepiness are crucial steps on the path that leads to good health.