Ok...Ladies... I know it's early... but door decor is a must!! It helps get that party started!! Our last cruise, we put up pictures of us (as a couple) and also decorated as a theme for our trip. We also added a dry-erase board for our friends to leave us notes, and updates (of where we could find them/meet them...etc). It makes it so much more fun to (occasionally) come back to the room. 
Also... post your cabin number if you want to .... so we can all see where our friends are on the ship!
(just some fun ideas to pass the months)