Work on your physical body and shape it to your liking

How you feel in your body matters and you have a fair amount of control over it. Accepting unchangeable aspects is a starting point (genetic hair loss, disease, height, etc.) Beyond those, you can control how you look and choose what satisfies you. Your clothes, your hairstyle, your posture, gestures, muscle mass, fat, etc. are in your control.

Exercise and work on your physical fitness. There is no need to push to the extreme and become an athlete but basic fitness, regular exercise, manageable weight, and cardiovascular health predict better quality of life, life satisfaction, and more happiness. When these aspects turn into a playground for social comparison, they backfire and cause distress. So ideally, work on your fitness and body for yourself within your means. A fair starting point for most people is 30 minutes of casual exercise 4 times a week.

Exercise can make us feel good through the release of endorphins and even partially protect us^[3] from depression.