If I had one day, and magic shoes to get me everywhere quickly...
I would have breakfast with Pooh and Friends at the Crystal Palace. I would ride Space Mountain, Big Thunder Mountain Railroad, Splash Mountain, Jungle Cruise and POTC. I'd have a Dole Whip to cool me off, catch Philharmagic.
Off to Epcot and get on Test Track and Mission Space. Hit Le Cellier for lunch, then Turtle Talk with Crush, and Soarin' (not a huge Epcot fan)
Then I'd head to AK, go on the safari, Everest a few times, Dinosaur, Kali River rapid, see the FOTLK and Nemo, get egg rolls at Yak & Yeti CS
Jump to HS, get on TOT, RNR,TSM and ST. I'd have dinner at Mama Melrose, catch Beauty and the Beast, go to Fantasmic and then back to the hotel to pass out