Outlet Shopping-- There are numerous outlet malls right in and around the major theme parks. Some of them offer deep discounts (a particular Gap outlet comes to mind), while other offer merchandise at near regular price.
Water Parks-- We love Blizzard Beach! Typhoon Lagoon is a lot of fun, too. We went in the heat of the summer, so I think that may be why I like BB better.
Miniature Golf-- We are always sure to play Fantasia Gardens (not the links! it's so hard!)
Downtown Disney-- Just about anything you want
Cirque du Soliel-- We love just about anything they put on
Benihanna-- It's in the Hilton in the DTD area. It's a lot less money than the Mitsukoshi in the World Showcase, and serving sizes are much larger. We've run into a number of member of N*SYNC there.
Kenndy Space Center-- LOVE it! It's absolutely a highlight of a trip everytime we get there
Leu Gardens-- I have no experience with them, but have seen some of the Disney Bride's photos from them. Stunning! And a nice retreat from the concrete commercialism!
Discovery Cove-- SeaWorld sister park where you can swim with dolphins, feed birds from your hand, and enjoy gorgeous gardens. It is pricey and books up quickly as the park is limited to about 100 guests per day. We got engaged there, so I am partial
Titanic Exhibit-- We did is not long after the movie came out. I am unsure but think I remember hearing they were closing it down. I am not sure of when though. If you had any interest, you might need to do a bit of research
St. Pete Beach-- Fabulous!
Florida Aquarium-- In Tampa. Be sure to check the schedule to see when the divers are feeding the sharks!
Mall at Millennia (Or, Millennia Mall?)-- Deisgner mall! We usually go to browse, not buy! We're talking Jimmy Choo, Luis Vuitton, Burberry retail stores!
Gatorland-- About 15-25 minutes from WDW. Have wanted to do it and have friends who have really enjoyed it, but haven't been there ourselves.
Splendid China-- Another one that comes to mind that we haven't done yet but have wanted to. It's like a miniature "China" of sorts. We visited soemthing this in the Netherlands with all the cities, etc., and it was fascinating! We loved being in the "my size" Netherlands as we were still young.
HTH!
xoxo