What is the most cost efficient way to plan a disneyworld vacation?

Book & prepay online. Saves money there. Instead of staying at a hotel we stayed at a house in Davenport FL. About 20 min. away from Orlando. Booked the house online at http://www.ownerdirect.com. Look under last minute specials. ... Do not book your rental car until you are done at Disney. Disney provides free transportation from the airport to your Disney Resort and then provides transportation to anywhere on Disney property while you are a Disney Resort Guest. ...