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.
Confidence isn’t about being confident but acting confident. Act confident and life will be a lot easier.
Except if you want to do good science. Good scientists will identify false confidence and will aim to steer well clear of it