Re: Cruising Skills/Practice
Get a sea gull and you will learn amazing things about engines... only kidding! But on the other hand, Have you ever read the book Zen and the art of Motorcycle Maintenance?
Personally I would have spare plugs, and swap them periodicly, try to achieve mechanics touch, snug but not stripped; try reading the plugs, black is too rich, sandstone is cool, white, too lean? I forget.
Get a multimeter and learn how to use it for continuity, voltage, and short circuits.
Know where every thru hull is, and work them periodicly.
Check your anchor rode, make sure you have a swivell, and stainless seizing wire on all shackles.
What else? A million things. Turnbuckles, dirt in fuel, alternate fuel filters for you diesel guys; know how to at least do a broadstitch with palm and waxed twine, Where's my beer?