These people had jokes and great advice of what to do and not do while you're young. If you are young, take notes! Being in your 20s is a wild ride. You're a teenager for a long time, then suddenly, you're out in the real world, getting a job, getting married, having kids… or just watching as your friends and colleagues do those things. While you might be the same age as your friend group, suddenly you all have different responsibilities in life. There's also just a lot of freedom in your 20s.…