Parenting.
It’s not the funnest job, or the one with the best paycheck. But it certainly is the most noble, the most important, and one of the most rewarding.
Any adult who comes into contact with a young person has the chance to parent in the way I’m thinking of it. Be an example that you would want someone to learn from. Make the choices you wish a child would notice, and some child somewhere, probably will. Behave, speak, dress, work, and play as if you are a role model. Some kid somewhere sees you. Go out of your way to positively impact a young person’s life.