I just signed up for the crown and anchor society (RCCL's past cruiser club). even though it has been 2 years since my first cruise with them they had all the info in the computer...it took 3 minutes to get my wife and I enrolled and she said she would note it on our upcoming cruise.
It's free to join and even with just one previous RCCL cruise we are entitled to the following benefits...coupon book delivered to our stateroom the first night, a welcome back party (free drinks?), a welcome back gift (no idea?), and free wine tasting (not my drink, but for free i will try it)....well worth the time to join.