- Fall in love (No special training required though). I am not referring to noodle love or so called relationships.
- Learn one basic life skill : You must learn some unique skill in you teenage years, apart from academics. Be it painting, dancing, Martial arts,writing,music or may be all famous guitar.
- Physical Exercise : This is paramount. You can develop your body later but never your body frame. Hard work in teenage years will help you to get stronger body frame, which you will cherish through out your life.
via What should every teenager do during their teenage years?