I wouldn’t dare defile Douglas Adam’s memory by not mentioning that you should keep a towel with you at all times, but my second contender is a surprisingly short three-parter:
- never lie.
- never tell the whole truth.
- never pass up a chance to use a real bathroom.
Form your opinions critically, don’t easily judge.
Thinking from every possible direction. Multiple times. Over and over. (Exhausted overthinker here)