My wife and I (1st time cruisers) will be on Infinity Feb 13th Hawaii-to-Ensenada to celebrate 20th anniversary . Any suggestions ( besides the obvious ;-) ) or little known tips to make this anniversary even more special (as if a cruise wasn't special enough!)
Be sure to let your travel agent (or at least the head waiter at your table) know about your anniversary. We celebrated ours too on the Infinity and they sang for us and brought the most magnificent European chocolate cake (to die for!).
They also have nice anniversary packages (you'll find how to order in your cruise booklet 2 weeks before you leave).