Just to add..
Go find your cabin and meet your Steward if the cabin is ready. If not get some lunch as Larry said. The early ones get the feast
And meet the main bartender before it gets busy.
If the cabin is ready, stow your carry on stuff, meet the Steward, set your safe up, and do a little dance. Freshen up, or whatever and go explore the ship. Then head for Lido to sail away and a "boat drink".
Then get the drill, recieve your luggage most times. Then head back up to Lido as you sail away. "Reservations?, I don't need any reservations" I just sailed away.
~ I want to go where it's warm!