While all the tools and parts have been covered, plan to bring a few days of all medications, contact lenses and cleaner (if used), extra pair of glasses, flashlights and extra batteries, (store the bottom battery reversed, neg to neg in the light), protein bars, and dry food packs, lots of drinking water, change of clothes including socks and underwear. space blanket, (its light weight) towels. Rain gear. If you don't have an EPIRB, get a personal one with GPS. A life raft is a bonus, but if not some flotation craft,(giant blowup swans don't count). A SAT messenger, or phone is a another plus. Actually, within 100 miles of shore you can be rescued and/or towed in within hours, the things that break are of lesser concern. MOB, fire, taking on water, medical emergencies, are all of greater concern. As prices come down you may even want to add an AED to the list. It is the medical and vessel damage incidents that concern me more, as seconds and minutes count. Having MOB drills, can save lives, knowing what to by repetitive training can make the difference between survival and disaster.