What most naturally follows?

How to get off a slippery boat ramp
Get your boat off the trailer.
( rarely do people have problems getting off the ramp once the boat is off the trailer. )
Check to see if everything is ready for road travel, things like making sure your boat is properly locked to the trailer so it won't fall off while being towed.
Get as much as you can into the bed of the truck for added weight over the rear wheels for better traction. People are a good help to sit in the bed right over the wheels.