How can i take care of my body and or myself as a teen guy?

Eat, be merry, peace: Young men's highest cause of death is violence or accidents. So think peace, man! Wear helmets, seat-belts, & avoid risky behaviors, especially if due to peer-pressure, Eat a healthy diet, optimize weight, be active and fit. Avoid ads for junk food, or junk meds, or junk, treatments. Safer sex. Respect others. Educate yourself to avoid things that increase risk of cancer, heart disease. Smile!