First, to relieve one's mental stress, there is no need to worry about things that can be solved, and it is useless to worry about things that cannot be solved;

Second, ensure a normal life, don't smoke, don't drink, be less stimulated (including physical and psychological), don't sleep too much, as long as you sleep one hour less than normal;

Third, it is necessary to exercise properly, play ball and run, and the length of time does not matter. No matter how you gain weight, you must ensure your health;

Fourth, get sick less and pay attention to self-regulation. Once you find yourself unwell, you must find a way to solve it.

Fifth, haha, eat more potatoes and pork, drink more broth and eat something late at night (PS: pay attention to maintaining oral hygiene);

Sixth, live a happy life.

Seventh, it is also a good idea to do some moderate-intensity exercise and increase some muscles.

The above is my practical experience, I hope it can be useful.