I recommend really comfortable sandals and a game plan.
Do all of the rides you want without having to go from one area to the next. Stay in one area for about 2-3 hours and then move on. This will allow you to see as much as you want w/o walking all over.
Stay and watch the parade, to give yourself time to rest and rejuvenate.
Pirates of the Carribean - the entrance turnstyle seems to be smaller than others. Don't know

it's like that but it is!
Thunder Mountain is a great ride, but some find it small for two- see if you can go by yourself.
Space Mountain - Lots of walking and waiting. To enter and exit, you go below floor level and the leg room is tight.
Buzz Lightyear - great ride for all.
Test Track - pull the seat belt as far out as you can to buckle in.
Everything else is okay, I think!
