1.Limit the intake of caffeine-containing drinks and food from before noon (the half-life of caffeine is 3-7 hours, and if consumed in large quantities, the half-life is longer). 2, before bedtime to avoid stimulating activities (such as 2 hours before bedtime not to exercise and exercise, not to watch the plot of intense movies and television, not to argue with people heatedly, not nervous into the work). 3, drinking alcohol before bedtime can help to fall asleep, but make the second half of the night sleep broken (easy to wake up). 4.Keep the bedroom quiet and cool. 5.Wake up at the same time.