Nowadays, most people are lacking of sleep, because part of them like to hang out at night and then stay up, or some of them are asked to work overtime. As a result, most people suffer from sub-health status. Getting enough sleep can guarantee both efficiency and our health. On March 21st, it is the World Sleep Day, which reminds people of the importance of getting enough sleep. Healthy lifestyle is the only way to help us to live a better life, so we need to plan regular timetable and do some exercise. No matter how much money we earn, if we are in poor health, we can’t enjoy a good life.