Ok, so I know this has been covered before but I feel compelled to bring it up one more time. Apologies in advance for any attitude that may be dripping out.
1. Get your boat ready BEFORE you put it in the water. Do not put your boat in the water then start loading ice chests and camping gear. This also goes for your trips to the Chinese restaurant to get take away or coffee. When you put your boat in the water, be ready to leave. Granted, you do have a little time before the person parking the vehicle gets back. Use that time to warm up the engine. When you get in the water unprepared, you are holding up others. A little courtesy goes a long way. It's not all about you Precious.
2. Move your boat back towards the end of the of dock as space permits. Do not just leave your boat sitting in the middle of the ramp. By moving towards the back of the dock, you will make room for others to put their boats in the water. It will also make leaving easier for you. This goes for when you return to the dock as well. Move your boat forward to allow others to get in.
3. If you don't know how to work the wench on the front of your trailer, figure it out in your drive way. When you get to the ramp, you should know what you're doing. Develop and communicate a plan to all involved. The person backing down the ramp and the people standing on the dock should all know in advance what they are supposed to be doing.
4. When retrieving your boat, put enough trailer in the water for the boat to get on. Get the boat on the trailer and get out of the way. Do not pull half way up the ramp and park. Get off the ramp and pull over to the side. Then, do what ever you need to do. There other people that would like to get their boats out of the water, not just you.
There are plenty of other things that should or should not be happening at the ramp; however, if everybody could just keep these few things in mind, it will be better for all involved.
Ok, done ranting.