Work out. It’ll get you addicted to achieving goals, like gaining weight or losing it. Upping your bench, etc. and that’ll leak into other parts of your life. Worked for me anyway, use to be 140lbs at 6’1 in high school and when I got to college I wanted to change and now I’m 10+ years in and I’m in the best shape of my life and it has given me the confidence to set my mind towards anything. The change starts small with something like getting out of bed everyday to go to the gym, then you start eating healthy, then you start living healthy, and before you know it taking care of yourself is part of your routine and not something to be forced. Life doesn’t have to be spent dedicated towards noble tasks. Sometimes just taking care of yourself is enough. And once you learn to do it for yourself you’ll find you’re better equipped to take care of others too. You’ll be a better brother, son, father, husband. And a life spent being good to the people you love is a life well lived.