Never leave Bill Monroe's band without his sayso.
Stay off of any train carrying Vernon Dalhardt.
Never be a junior officer on a Star Trek voyage. If you must be one, never, ever walk ahead or behind or anywhere near a senior star either going down a corridor or exploring a new planet. The best job on a Star Fleet cruiser is librarian. Virtually no one reads a book. No one ever goes to the library.
yours, Peter T.