mix and match your outfits, wear your lightweight sweater on the airplane, limit your shoes - wear your sneakers/walking shoes, pack one pair dress shoes/sandals,one pair of water sandals/shoes one pair casual shoes/sandals, stuff your carry-on to the limits of what it will hold. Plan on doing some laundry at some point in time, buy cheap t-shirts on board and on the islands, leave them behind on the ship.