1. A tip for European visitors - you're likely to find that you will start getting tired the afternoon of the 1st day so however much you might like to start with Magic Kingdom I would suggest starting with Animal Kingdom, it's the easiest day and the closest to your home.
2. Short Cut - If you're home is south west of Disney World there is a short cut to Animal Kingdom, which I suggest you print out - http://goo.gl/maps/MvN7R - you can use this route if the main road (US192) gets busy. You can use this route to any of the other Disney parks as well just continue down Osceola Pkwy instead of turning into Animal Kingdom. Here's the exit route out of Animal Kingdom as well - http://goo.gl/maps/lXGjZ.
3. Crowd Calendars - It can help to plan which days are best to each park by looking at these 2 crowd calendars Touring Plans and Undercover Tourist. Touring Plans you have to pay for to see the whole calendar but it shows 1 month of the crowd calendar 30 days from the current date so if you look 31 days or more before your stay your dates will be showing, then just print it out.
4. Disney Dining - You have to book restaurants in the Disney Parks otherwise you may struggle to get into the table service restaurants. It's easiest to do this online - http://disneyworld.disney.go.com/reservations/dining/ - you can search by name if you've seen one you like the look of or by park. Menus are online as well. If you have any questions about restaurants and character meals please ask.
5. Universal Dining - Universal Orlando Resort has a lot of great restaurants, they don't get booked as quickly as Disney but it's worth planning ahead. 407-224-4012 or they book online through OpenTable which is a free service definitely worth signing up for. You get points for every reservation that you attend and these points get turned into cash at different point levels to be redeemed in any OpenTable restaurant.
6. Disney App - If one of your group has an iphone / ipad I would suggest downloading the free app - My Disney Experience which shows ride wait times and the times of the current fastpasses including a lot of other information which will help you before and during your stay. You can also book restaurants through the app.
7. Harry Potter at Universal Orlando - If any of your group don't have the stomach to do the main Harry Potter ride inside the castle you can tell the cast members you would like to do the 'castle tour' so you can see inside the castle without going on the ride which is an attraction in itself.
We are big theme park fans, particularly Disney, so if you have any questions please don't hesitate to email or call us! :-)