I asked a friend of mine this question. He is a long time DVC member and knows WDW inside out....
Here are his ideas...this could be quite long.
From The Maddening Crowd
For a slightly different day away from the theme parks, you visit some of the Walt Disneyworld resorts. In fact an entire day can be spent just sampling the restaurants, cafes, shopping and entertainment to be had at the Seven Seas Lagoon hotels alone.
Why not start from the Transportation and Ticket Centre and take the monorail as though you are a Disney hotel guest around to the Polynesian Resort for breakfast. This is usually served on a skillet in the main restaurant and leaves you with a feeling that you will not eat again that day I bet you do! Next to the restaurant entrance is a café style bar, which serves an outrageously delicious banana and cinnamon bread. If you do not see that on the menu, ask for it.
Whilst the Polynesians guests set off to the parks, relax after breakfast by strolling along the beach, check out the rope hammocks and then make your way back to the monorail by the tropical waterfall near the entrance.
It is then on to Disney premier resort, The Grand Floridian. You will understand the grandeur that is the resort the minute you enter the impressive lobby. Go up to the 1st floor and have a browse around the shops there. If you have time for a spot of sunbathing try out the lovely beach area out to the right of the main lobby area. You may even have time to hire a little water mouse speedboat from the marina here. Whatever you do will no doubt be very splendid indeed.
If you can tear yourself away, go back to the monorail for a trip past the Magic Kingdom entrance and on to the Contemporary Resort. The approach alone to this hotel is a treat in itself. The monorail runs straight through at a height of about 70 feet. If you alight at the station, go down the escalator to the ground floor and lobby area. Again you are faced with various shops and cafes, but this time go past to the lifts and call in at the 15th floor. This is one of Disneys most exciting dining experiences; you can however just call in for a coffee. Although if you have the time and budget and evening meal here is unforgettable. This can be booked (well in advance!!!) to coincide with the firework display at Magic Kingdom. You may even want to take your pre-dinner drinks outside on the walkways which perch high above the Contemporary itself. Whilst eating you may a little later see the evening water pageant which makes its way around the Seven Seas Lagoon and on to Bay Lake.
From the Contemporary, take the monorail back to the Ticket Centre for your return journey, or for a romantic evening go back to the Polynesian for dinner, not forgetting to stroll around the resort whilst lit torches light the pathways.
A Romantic End To The Evening
Try a visit to the Wilderness Lodge. Listen out for the crickets evening song outside the lobby, whilst looking out for grizzly bear tracks near the car park. As with many Disney resorts the lobby is really something to see. Fashioned on the 19th century wooden lodges found high in the Rocks this is a treat in itself. An adults bar area just off to the left of the lobby serves delightful liqueur coffees. Whilst a walk outside along the shores of Bay Lake takes you past Ol Faithful, Disneys very own hot-springs gusher. Unlike the one in Yellowstone Park this one erupts on the hour and half-hour.
A Grown Ups Evening With A Difference
Pleasure Island offers many club and bar experiences but The Adventurers Club is like nothing you will have known before. Actors interact with the guests whilst the walls are bedecked with historic artefacts collected by Disneys very own explorer. Off the main bar area is the Mask Room and Library offering their own entertainment whilst a great vantagepoint can be had from the balcony above the club.
Fast Food With Style
Between the Yacht and Beach Club resorts, near Epcot is Beaches and Cream soda shop, open throughout the day for burgers, fries, malts, shakes and desserts its a great place for kids of all ages. Bar or booth seating offers great fun food in a real Happy Days style diner. To visit at night is a real pretty experience with the Yacht and Beach being 2 of Disneys finest hotels.
You have to have a milk shake here!!!
To get to Beaches and Cream, you need to leave Epcot via International Gateway. This is situated between England and France in the World Showcase. Exit the park, and then either walk or even better catch the boat which will first stop at Disneys Boardwalk (worth a visit) and then it will stop at the Yacht & Beach Club. When you get off, walk towards the hotels and Beaches and Cream is on the right hand side as you look at it from the boat. The best bet is to walk to the main entrance to the hotel directly in front of the boat stop and then walk along the veranda on the outside of the hotel and you will then see Beaches and Cream.
A Rainy Day
Unlikely but if the rain is in for the day. Take a trip to Downtown Disney. With enough shops and sights for those not wishing to spend it really can be as interesting a day as you will get anywhere.
The biggest indoor attractions have to be either Cirque Du Soleil the non-animal circus or the innovative DisneyQuest (theme park in a box). With the very latest virtual reality attractions, build and ride your own computer generated roller coaster, or just replay some of the early 70s video games. This has to be a video buffs dream. By the way if you can tear yourself from the fun, try The Cheesecake Factory when its eats time.
Brown Derby and Fantasmic dinner package
You can book a meal at the Brown Derby in MGM, which also includes reserved seating at the Fantasmic show. This is well worth it, as to get a seat for Fantasmic without this can mean queing for two hours!!!
Go to any guest relations place anywhere in the World (I booked at City Hall in Magic Kingdom), and ask for a Fantasmic dinner package at the Brown Derby. We booked a couple of days in advance, so best to do this on your first day there.
When you eat at the Brown Derby, try the Cobb Salad, and the Fillet Mignion. Bloody marvellous.
Fantasia Golf
Next to the Swan hotel, there is a mini golf course, which is in a different league to everything else Ive seen.
Its a bit on the expensive (as its Disney) but it is worth every penny. Some really nice effects and suprises along the way. This is best played at night!!
Out of the World treats
Two restaurants Ive not been to, but come highly recommended are;
Bahama Breeze
Romanos
Both these are near the Crossroads shopping centre, near Downtown Disney.