One of the coolest things we did on our last trip was to take the time to visit other resorts. We had a 12 night stay at Pop Century and a 10 day park base ticket. I love having that much time so that I have at least 2 days at each park. That way we don't feel rushed to enjoy the park. We can get to the park at rope drop and ride the cool rides before the crowd gets there, then take a break and some days leave the park during the afternoon, and come back at night when the crowd starts to ease up.
Some days when we left the park we went back to Pop and took a nap, but on a few of the days we would visit a nearby resort for lunch. That was something we hadn't really done much of and it turned out to be really enjoyable.
On one of our Magic Kingdom days we had lunch at the Contemporary, and on another at the Polynesian. Then one night we left Magic Kingdom and took a boat over to Polynesian to watch the fireworks from the shore of Polynesian, that is a really cool place to watch the fireworks, they pipe the music over.
On one of our Animal Kingdom days we went over and visited Animal Kingdom Lodge. Had not visited there before and it was really cool to see. Not sure if I would want to stay there but it was cool to visit.
Also visited several other resorts. But Epcot is not the easiest place to leave as the park itself is so big, it takes a lot of walking to get in and out of the place. Most visits to Epcot we are lucky to make it all the way around World Showcase.
But that turned out to be a fun thing to do and I am planning to do it again the next time.