We are fairly new to boating and have been experimenting with the best way to leave our slip. Our boat is parked stern-in in the slip so that it's easy to board and attach the shore power. Our launching procedure after all the engine and safety checks is to run the blower for 5 minutes, disconnect the shore power, start the engines and wait for them to start to come up to temperature. We have 5 lines on the boat: 2 on the bow, 2 on the stern and 1 spring line. We take off all the lines except the spring line and since our slip has dock running along both sides, I usually hold on to the boat so it doesn't move too much. With someone at the helm, I undo the spring line and walk the boat out of the slip as far as I can and then jump onto the swim platform. By that time the boat is practically out of the slip and once I'm on the swim platform who ever is at the helm puts the boat into gear and off we go. We found this way easier then putting it into gear when fully in the slip because we always bumped into the poles at the front of the slip. How does everyone else do it?