Okay...some of these are better than others. Some are more obscure than others, and some are a stretch. But feel free to add more in the comments! Bonus if you know where they come from.
1. Always know where your towel is.
2. Remember: Don't Panic.
3. Small furry creatures are always a bad idea.
4. Stay on target....
5. Size matters not.
6. Weakness can often be traced to a small exhaust port...
7. The term is companion.
8. A companion chooses her own clients. That's guild law. But physical appearance doesn't matter so terribly. You look for a compatibility of spirit... There's an energy about a person that's difficult to hide.