Just slow down and take in all the details. I swear one year my son and I sat on the bench outside of Italy in WS and happened to look up. Saw the statues on the top of the buildings which sparked a discussion as to who they were, which sparked a google search on the phone, which sparked another discussion after we figured out who they were. We sat there a good hour, I know everyone must have thought we were crazy just looking up but it was great. There is a nice peaceful tile room in the Moroccon pavilion, we love to sit there and relax.
MK: Ride the Liberty Bell, it's a peaceful ride, never crowded and you see things you don't see otherwise. Ride the train, goes all the way around the park and again, you see things you don't normally see.
AK: Stop and watch the monkeys play in Asia, walk slowly through each of the trails, walk the trail around the tree of life, stop and watch the performers.
HS: Watch the Star Wars stuff (I can't remember what the shows are called so stuff works) even if you aren't a Star Wars fan, which I'm not, it's fun. Watch the street performers, they are hilarious. Look in the store windows, the details are amazing, especially the windows after you get off the ToT.
Epcot: Watch the performers, watch the movies in China, France and Canada, wander through the gardens in China, France, GB and Japan. Take a tour of the tea garden in GP. Spend time in the Living Seas. Ride The Land, it's one of our favorite rides, the behind the seeds tour is only like $15 or so and well worth it.
Resort hop, decide if you are doing deluxe, moderate or value then go to the bus stop area and kind of hover, get in the line for the first bus coming around. Do a monorail resort crawl, eat lunch at one of them. Exit the IG from Epcot and walk around the Boardwalk and visit BW, YC and BC then grab some ice cream at either BW, BC or Dolphin (our favorite).