Here's what I do
This method requires two dock lines, and good brakes or wheel chocks for the tow vehicle, because you have to get out a couple of times. I learned it from the guys working at the first marina where my boat was kept.Tie the dock lines at bow and stern on the side of the boat facing the dock. Hang fenders on the boat if needed and disconnect the towing strap from the bow. Back the trailer into the water (try to stay close to the dock) until the stern just starts to float (you should feel the boat move on the trailer slightly).Set the truck brakes, get out (chock under the front tires if needed), go up on the dock and secure the two lines on the nearest cleats on the dock. Make sure to leave a little slack. Now back the boat the rest of the way in until it just floats (you will see the bow fall in the rear view mirror). Set the brake again, go up on the dock and use the dock lines to move the boat back away from the trailer. YOur feet will get wet but you won't have to get on the boat at all.When retrieving the boat, back the trailer in until the water level is at the mark on the trailer that you made when you launched the boat. Pull the boat into position using the docklines, tie off on the dock and haul the boat out. It's a little tricky with the wind, but if use the downwind side of the dock you should be fine. Good luck.PeterH23 "Raven"