Number 4 is not always possible. I made sure there was a laminated list in plain view with emergency numbers for phones and frequencies for the radio. Good idea to include a local towing service in those numbers. My 26 foot cruiser crapped out on me just before the channel entrance to the harbor. Didn't have an anchor yet, so called the towing service and towed us back to the slip. If not for that, may have wound up on breakwater rocks before Harbor Police could get to our location.
Number 7 should always be rule for the skipper. However, if the passengers drink, stop any horseplay immediately.