A general tip...

[Dakota Kid]

Everyone is talking about spare keys for boat or truck. Hide a key for your truck in a box under your truck on the frame rail. Most boxes are magnetic. Strap a ziptie around it to safe gaurd it falling off. Keep handy spare wheel bearings, grease, and tools for your trailer. My partener and I would have been dead in the water, so to speak, if we didn't keep a spare set. When you buy outboard oil, pour half into the tank and store the other half or just keep a spare quart handy.

[sglass]

I keep a ratchet set in my boat along with electrical tape, spare electrical wire, fuses, spare switches and everything i need to make a quick fix in case anything bad were to happen. I have shorted a blacklight out once launching by myself and almost burned my boat up. I sat in the parking lot for a while and replaced a couple switches and a few wires and was able to salvage some of the night.