Make various simple Disney things into special memories: For example, think of special memories; adventures, difficulties, activities, milestones, places, etc. during your relationship then find something at Disney to represent that memory. Use a card, buy a gift at a gift shop, ride a ride, visit an area; whatever related to the memory and talk about it.
One example: Made a trip to India or Nepal? Visit Everest or the Asian section of AK and do or buy something to remember that special trip. Went river rafting on a date? Go to Kali River rapids. Your first child? Find a cute small baby gift in a store. Went to the drive-in when you dated? Relive it at Sci-Fi Diner. Anything at all that can be related to something in your life together. If necessary, the relationship between the memory and the Disney connection can be very indirect or imaginative, just so you make that place, action, purchase about the memory. Make it an adventure to relive these memories by making a Disney connection.
Book a carriage ride and then plan to walk around POR after dark. It is beautiful and romantic. Then take the boat to Downtown Disney for shopping etc.
Depending on which anniversary it is, re-propose or do a vow renewal. This can be a full formal reciting of vows, or it could be a very brief informal few words together.
If it is only a handful of years, pick a different place and celebrate each year of your marriage.
Get multiple cards for each other: One for each year, each milestone, or each day of your trip. (We did a 12 night cruise for our 25th and I got 13 cards, one for each day, and each said something different I love about my wife.)
Make the time to just stop and enjoy each other's company. Sit somewhere nice in one of the Parks, but pay attention to one another, not your surroundings.
