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.
Develop a treatment scheme that works for them as it would for you. The first step in treating others the way you’d like to be treated, is finding out what they like.