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.
Being a Jack of all trades may mean being a master of none, but it’s still better than to be a master of one.
I frequently have to teach people about being T-shaped.