I made my husband a WDW trivia quiz and he had to take a picture of each answer. He had fun and now we have some fresh pictures for our scrapbook.
Other "new" things we have done:
pin trading
collect character autographs
try new restaurants
bought Pal Mickey
watch the fireworks and parades from different locations
look for Hidden Mickeys
took pictures of things at Disney A-Z (another scrapbooking idea)
Hoop De Doo and the Spirit of Aloha Luau
Keys to the Kingdom tour
ride all of WDW's transportation options
got "rehitched" at Garden Grill
character meals
try unique snacks (Kaki Gori, etc.)
got a haircut at the Main Street barber
Oh, and wewatched Cinderella's Surprise Celebration from "behind the scenes" (literally behind the castle--the show loses a little of it's magic but it was amazing to see the characters running around backstage.)
My family doesn't understand why we've been to Disney seven times in the past three years, but it truly is a magical place for us and we always make sure we do NEW things.