Eat the proper diet, no junk foods, exercise, have a lot of rest and sleep,
avoid too much stress, don't smoke, take illegal drugs, no alcohol, have good friends who will support you emotionally.
The good looking part? If you're healthy emotionally, psychologically and physically, you'll have that natural glow and beauty. Genetics play a great role in beauty. If your parents are naturally good-looking, probably you'd also be like them. Other than that, if you don't like some physical features, you may have plastic surgery if you can afford it.
