Seeking Disney World Tips
If you are a AAA member, it is good to book through them.
Never buy tickets to the park while you're there.
I recommend getting park hoppers, so you aren't tied to one park all day because closing times do fluctuate. Also, if you get 10 days, it's a better deal, you'll just have to pay for no expiration. In the end, that makes more sense because tickets go up yearly.
I recommend staying at Port Orleans French Quarter on property. It's the nicest of the moderate resorts. My favorite deluxe is Wilderness Lodge, and the newest value is Pop Century. Staying on Disney property will make your life easier because of Disney transportation and extra perks like Extra Magic Hours. Book your room as soon as possible.
If your children are into Pirates/Princesses, look into getting Mickey's Pirate and Princess Party tickets for the Magic Kingdom. If you do this, I recommend taking the day off and resting, swimming, etc. and then your kids will be energetic for the party. The earliest they let you into the MK for the party is 4. Many parents don't let their kids rest that day and wind up leaving early (before the special fireworks and parades).
Look into the Disney Dining Plan. This is the best and most affordable way to eat on Disney property.
Pick up the 2008 Birnbaum's Guide to WDW. It couldn't hurt to take a look at it.
If you have any questions, feel free to PM me.