If you're looking for something to do in Key West, consider taking a jet ski tour. I did one through a company called Fury, which cost $129.95 per jet ski (you can go tandem for the same price) although they have a discounted price of $99.95 you manage to snag the first tour out at 8:30 am. You can also get a discount if you book online on
http://www.furycat.com/mobile/jet-ski-tours.php
Too bad I didn't know beforehand!
When I rented jet skis in California they usually tell you can go around a small area of the ocean, which is fine for trying out jet skis. With this tour, though, they actually take you on a 28-mile loop around the island of Key West!
You take off along with about ten other jet skis, forming a well separated line, slow at first until you exit the marina. Then they will tell you that the minimum speed you should maintain is 30 mph and that the faster you go the easier it is to make tight turns. Those who want to go full throttle (that's 45 mph) go first behind the first guide.
For the first half of the tour you enter the Gulf of Mexico. The waves are smaller here, so the ride's not too bumpy. "This is easy", I thought! Until I entered the open ocean ...