[RidgeRunner]

Informative.

I carry a set of reflective triangles in my truck box. Easy way to be seen on the side of a dark road. Also a bottle jack a block of wood for stability of jack, 4-way, bearings, grease, chisels, hammer, rags, an extra hub loaded with bearings, spare tires, basic hand tools and some rags and gojo for washing up.

Everybody has their way of launching. A Pre-launch checklist is a must as is keeping your cool. A busy launch ramp can be intimidating.
Beyond that when I launch, I prefer to back the boat off the trailer. I back it in to my pre-marked level (CB)(or until the stern starts to float) set the brake throw her in park (REEL), get out and release the safety chain and winch strap from the bow eye. If I hit my mark the boat will stay put on the bunks. (If it starts to slide off I can pull the truck out just a hair before releasing the winch strap) I then climb over the bow via the winch stand and see if she will start and make water before backing it off and mooring it to the dock. It is quick, effective and saves a lot of time in the event the engine won't start. I don't think it would work for the guys with roller trailers or runaway Yamahas (RWilson). A quick look around your tow vehicle post-launch to make sure everything is locked away and you didn't forget anything: sunglasses, cell phone w/charger, food, drinks and incidentals..
Be safe..