Tips for someone in their 20s ?

Get a really firm grip on reality.

learn how to manage money and invest
stay away from extremist politics
work on mental and physical health daily
have fun!

The same as for anyone in any age bracket. Be accountable. Have fun. Seek adventure. Make yourself uncomfortable once in a while. Find someone to love and who will love you. Enjoy your body while you can. Be kind.

Never trust anyone over 30.

Mind your manners— people never forget how you made them feel

maintain friendships

Don't die

Don’t drink and drive

Fuck like a beast