Order the free DVD from the official Disney website. It will give you a good working knowledge of not only the parks, but also of the hotels and the other aspects of the Disney resorts.
Check your local library and see what books on Disney are available. Even if they're not the latest edition, they'll still give you a good working knowledge of the parks. If you prefer one book over the others pick up a copy at your local bookstore to bring with you on your vacation.
Research hotels in the area. Weigh the options, whether you want to stay on-property or off. On-property hotels usually cost a little bit more, but they also have special amenities, like extra hours in the parks and free on-site transportation. When booking your hotel, ask the reservation operator for the lowest price possible. Sometimes they will be able give you a better deal just because you asked.
Have everyone in your family make a list of three rides or attractions that are "must-dos" for each day. That way, everyone will have their turn, and no one will feel left out. At the same time become familiar with the park maps. If the book you're using doesn't have maps you can download them from the Disney website. Plan out your route, knowing that there will be changes and taking into account the more popular rides, which you might want to ride early.
Consider planning a day away from the parks. Several consecutive days of rides and thrills can be a bit much for anyone. A slower day, in the middle of your vacation, will offer your whole family a chance to recharge and be ready for another fun day in the parks.
Be flexible. Even if you plan things down to the last second you need to allow for variables. If there's a short wait time for the ride that you're about to walk past, go ahead and ride it, even if it's not on your list. You just might find a new favorite. Don't force anyone to ride something that they're afraid of; nothing will ruin your vacation faster.
