Avoid excitatory substances (coffee, strong tea, smoking, etc.) several hours before bedtime (usually after 4 p.m.); do not drink alcohol before bedtime, as alcohol can interfere with sleep, Xu Yafar, Department of Cerebrovascular Diseases, Qingyuan City Hospital of Traditional Chinese Medicine Regular physical exercise, but before going to bed should avoid strenuous exercise; do not eat and drink or eat indigestible food before going to bed; do not do easily excitable mental work or watch easily excitable books and film programs at least one hour before going to bed; the bedroom environment should be quiet, comfortable, light and temperature appropriate; maintain a regular rest time.