After you sail on Carnival, send them a letter telling them what you like or did not like about the cruise. Address it to their corporate office in Miami. 9 times out of 10, you will get a response from them 6-8 weeks later thanking you for the letter and offering you a free gift on your next if you sail within 18 months of postmarked date. Then you call the 1800 number provided in the letter within 30 days of your next cruise, read to them the claim number listed in the letter and you are all set. Sometime during the embarkation day you will receive whatever gift they decided to give you. We've only been offered wine or a photo coupon in the past and we took the coupon.