The shortest feedback loop I can think of is doing improvisation in front of an audience.

It seems that man's greatest natural enemy is the target.

If you are trying to impress a woman, leave any sort of show farting out of the equation.

Conclusions are based in time. We live in time. So any definition of success is bound up with time. With other things you can say, "Can I yo-yo? Can I juggle?" Usually you have a pretty small window in which to get your answer. Stand-up is different. You can't do stand-up for one night and say, "Am I a funny stand-up comedian?" In two months or two years you'll start to realize it.

Relationships, like eyebrows, are better when there is space between them.

One thing you never hear is "Man that guy is good at badminton".

I think hair gel was invented to make it easier to identify assholes from a distance.