Have you bought any of the books? We bought The Unofficial Guide to Walt Disney World 2008 and it has all kinds of good tips & tricks.
Ken has also talked to some guys he works with this is what we have learned:
Rent strollers at Disney and keep your receipt in case someone takes yours by accident you can get a replacement. Mark yours with a ribbon or bandana and take a small towel to wipe it down in case it rains or gets spilled on.
If you have little kids don't plan on going to the closing parade unless they take a big nap during the day. It isn't over until 10PM and then everyone is leaving at once, the exit gates and shuttles are packed so you won't get back to your hotel until midnight-1am.
But rides are less busy during the parade time because everyone is watching.
If you are going to visit other parks don't start with Magic Kingdom because everything after that will be a let down.
One day is plenty for Animal Kingdom.
You need at least two days for Magic Kingdom
Buy meal passes - we are still looking into this but the meal tickets are MUCH cheaper than paying in cash for each meal.
Check out
MouseSavers.com - Disney Discount Source - Disney .
If you stay on property and buy stuff at DW you can have it delivered to your room.