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.
Take chances, make mistakes, and get messy.
Learning good technique is hard and boring. Solve a problem the wrong way first, and you’ll find out what technique improvements are worthwhile.