Ah, so you are staying in one of the nicer resorts. Good for you! With 7 whole days there, you will get to see and do most everything that you want to do.
Many people enjoy seeing the parks in the order in which they were built. So that means that they would be going to Magic Kingdom, Epcot, Disney MGM Studios, then finally Animal Kingdom. Depending on what day you are arriving, you may not want to do this and this is why.
Go to
http://www.disneyworld.com From there you can go to their calendar and see what the operating schedule will be during your visit.
Magic Kingdom's new closing show, "Wishes" only happens on "special nights" which are mainly Saturday nights. (You DO NOT want to miss Magic Kingdom's closing night show or the Spectro Magic parade. They RULE!) Also, MK is usually open later on Saturdays. Also don't miss the "Share a Dream Come True" parade. It usually happens around 4 PM. Great show!
Epcot is generally open same hours every day of the year. Future World will be open early in the morning, World Showcase opens at 11Am and is open until 9 PM. At 9, Epcot has it's closing show "Illuminations: Reflections of Earth" Again, you do not want to miss this.
Future world has two big rides, Test Track and Mission: Space. Use Fastpass for these. With 7 days, you can take your time and see everything at your own pace, which I strongly recommend. World Showcase is better appreciated slowly, explore each country, have some food and drink.
The Disney/MGM Studios usually closes at 9 as well. And it has another must see closing show, "Fantasmic!" Get your seat for it an hour early, so think about getting there by 8. It is located near the Beauty and the Beast stage show and the Aerosmith Rock&Rollercoater and Twilight Zone Tower of Terror.
Animal Kingdom closes at 5 PM every day of the year. This is their newest park, so there isn't quite as much to do here as the others have, but it is still an interesting experience. There is NO closing show for this park...yet!
There are two water parks that you can also go to, Blizzard Beach and Typhoon Lagoon. Both close early... I think 5 or 6 PM, but again, check with the website to find out.
Finally, you can check out Downtown Disney at night. Most stores there are open to 11PM, restaurants are open to 1 or 2 am and the dance clubs are open to 2am. I assume you are getting the Ultimate Park Hopper ticket? If so, you will probably get a voucher for $25 off dinner at Planet Hollywood. Use it, great place, fun decor! Make sure you see Disney Quest, a 5 story interactive virtual arcade. Also check out the Lego store and the World of Disney store. In Pleasure Island they have several different clubs and there is a place called the Adventures Club, which is like an interactive story that you walk threw. It should be free with your Park Hopper ticket, as is Disney Quest.
So, you have enough time, use it. It is very easy to wear yourself out there, but a week is a great amount of time to have there. Eat in some of the fun places there ... each place has some interesting restaurants, especial World Showcase in Epcot. Some places require priority seating, ESPECIALLY in the Magic Kingdom. Call NOW to make them. The Crystal Palace is a very popular place there, but if you wait until you are on Disney property to make reservations, it may already be too late. There is a restaurant in Cinderella's Castle and you need to make reservations there 6 months in advance.
If you have any other questions, anything specific, feel free to ask!