Everything on here is spot on for successful and fun launching.
I usually launch on my own, either singlehanding or the wife is watching the kids. I will have a long line attached to the bow and a regular length line attached to the stern on the dock side. If you keep the ballast closed during launch things go much smoother. I will back down the ramp, then d/c the hook on the bow. I will push the boat until it's almost freely floating. Then I will hold the long line while moving to the dock (that's why it's long so I never let go of the boat, never had a problem but if things went right all of the time I wouldn't have a job at the Fire Dept). I can maneuver the boat off the trailer and to the dock using the two lines then tie off. If I have help, I hold the bow line and my helper holds the stern line. It's a very good idea to make sure the centerboard control line is locked in the up position or the centerboard can hook the trailer when launching (not the end of the world, but very inconvenient). Once you are docked, open up the ballast, it should be full by the time you park the truck and are ready to sail.
Also, I use the topping lift to help attach the boom. I keep the main and boom in the cabin when trailered. My topping lift just comes from the top of the mast and clips to the end of the boom (previous owner, going to modify a bit). I will move the end of the boom to near the stairs then attach the topping lift. Now you have a second "hand" holding the boom and you can easily take the boom out and hook it and the main up without having the fight with the boom at all. Taking down is the same. I'll disconnect the main and boom, then carry the boom into the cabin with the help of the topping lift on the other end before I disconnect it.
Something else that may help your setup time, depending on where you sail. When we sail in the gulf we have a couple of miles of river channel to go through before we hit the open gulf so we'll put the mast up, launch, then do the rest on the water. The admiral will helm and I'll rig. We'll do the same coming in. Saves a ton of time at the ramp.