Eat a full meal, sleep for eight hours, drink eight glasses of water every day, and walk for an hour after meals. Have a good attitude, be aloof from things, respect the old and love the young, do good deeds, love life, be self-motivated, learn new knowledge, make new friends, travel around the world, give up smoking and alcohol, give priority to vegetables, supplemented by miscellaneous grains.
Being able to understand and do it is the best way to stay healthy.