Preparation, efficiency and consideration are the bottom line to minding your manners while launching and docking your watercraft. Boats.com offers the following tips for proper dock and ramp etiquette:

Be prepared. Make sure your boat is ready to go before you pull onto the ramp. Load gear, get lines ready, remove tie-downs and test the engine in another area so that other boaters can access the ramp while you prep. When you are ready to launch, have a driver in the boat so that the boat can be started as soon as it's in the water. When you return, unload your gear away from the ramp.
Practice your job. Whether you're driving the tow vehicle or will be driving the boat, be ready to do your designated job. If you're inexperienced when it comes to backing your trailer down the ramp to the water, practice maneuvering your trailer in an empty parking lot or other vacant space. The boat driver should be ready to start it up once the craft is in the water. When reloading the boat onto the trailer, do not accelerate to "power load" the craft — this can create shallow sand bars near the ramp.
Be courteous. If passengers are not ready to board, idle away and return to the ramp or dock when they are ready. When you return, drop off passengers and idle the boat away until someone returns with the tow vehicle and trailer. The driver should get the boat into position as the tow vehicle approaches.

Proper launching and docking techniques are essential knowledge for any watercraft owner. Knowing your role, keeping the process efficient and being courteous to other boaters are key when you are launching or docking your boat.