Okay, this is just based on my opinion and my likes but here goes: And I am ranking these in order of what I would do the most and not do the most.
Must do:
Spaceship Earth, I love it, its very relaxing and it would be a shame to be at Epcot but missing riding in the famous geosphere landmark. There's also hardly ever a line and its the first thing you see when you walk in the park.
Soarin: Do not miss this, its incredible. Its inside the Land Pavillion and there is a boat ride as well as a movie. But if you only have time for one thing in "The Land" do Soarin above the others.
Test Track: Pretty cool ride, lines get long however so fastpass it (that goes double for Soarin).
The Living Seas: Lots of nice exhibits it also has Turtle Talk With Crush which is very cute and the new Nemo ride that is opening soon (or is already?).
Mission Space: If you have a tendancy to get motion sick go on the tamer version.
Okay to skip:
Journey into the Imagination. Its outdated and while I like Figment, on a short trip I wouldn't spend the time.
Universe of Energy: I actually really like this but its time consuming and again on a short trip might not be the best use of time.
Honey I Shrunk the Audience: Unless you are a huge fan of the Honey I Shrunk movies of the 80's skip it, its outdated and there are way better 3D shows at WDW (Tough to be a Bug at AK and esp. Mickey's Philharmagic at MK are so much better).
Innoventions: Totally outdated, little kids have fun but its really quite cheesey.
Again those are just the thing my family enjoys alot and not quite as much! Have a great first trip to WDW!
P.S. Have fun at
Disneyland in a few days, I love Paradise Pier (stayed there twice)!