Eliminate distractions. If you can get rid of distractions and stop thinking, it's easy to fall asleep. If you can't, just think of a happy thing, and it is easy to fall asleep when you are in a happy mood. Before going to bed, take a deep breath in the fresh air for a few minutes. Get rid of waste gas, breathe fresh air and make your body feel comfortable. In particular, the absorption of negative ions can strengthen the process of cerebral cortex inhibition and have hypnotic effect. Negative ions can relax bronchial smooth muscle, relieve spasm, make breathing smooth, and be more conducive to sleep.