If you guys are wine/soda drinkers, be sure to take advantage of the BYOB (1 bottle of wine + 12 pack of cans). Was able to save a lot of money on my latest short cruise. Also, tell them to wander and explore the ship at their own leisure the first day. It'll be good to find the little areas that you'll want to hang out in and get a chance to at least see all of the ship and what it has to offer.