Happy anniversary! What a great reason to visit WDW.
For planning away from your computer, I would start with the free planning DVD you can order from Walt Disney World. Just click
HERE, fill out the form and the DVD will be at your house in a week or so. You can also order free park maps from WDW, the order form is
HERE.
While this free information from Disney is great, it would NOT be enough information for me to plan a WDW vacation with. For this, I strongly recommend that every visitor to WDW get a good Disney guide book (or two or three). There are many Disney guides that can be found in larger bookstores and through Amazon.com. Most can be purchased for less than $15.00, or if budget is an issue, local libraries often carry Disney travel guides.
Click
HERE for my tips on which Disney travel guide work best for me.