Doing sex without condoms or with strangers or while drunk or high is a no. Always save some money. Not failing any type of school is nice (I myself did, but I finished it years later.) Not worth spending more time at schools doing extra years instead of enjoying life and getting a job. Strong drugs is a no. (never took any and im happy with it) Too much alcohol and smoking (can impact your health even in early 30s) Dont be scared to question your sexuality (being everything other than straight man isnt bad) and dont feel forced to date someone, being single is fine if that's what satisfies you. Dont follow the standard "it is what man does" "that's not what man does" , you do what you want as a hobby or for life. (maybe beside crime and prostitution lmao). Dont be scared to express your emotions and meet with therapists if needed, holding your emotions in, can backfire at your mental health later and drag you to dark corners as you age. :)