K.B.
1. Pick up the Unofficial Guide to Disney World - they come out with a new edition every year and it's invaluable for planning things out, especially when it comes to trying to hit as many rides and attractions as possible while minimizing waiting in line.
2. Get the park when it opens and be there for rope drop - it won't be as crowded as it will be later, when most people decide to take their time, linger over breakfast, and then show up at 11 and complain about all the lines. Then you can take a break in the middle of the afternoon if you want to and head back in the evening. Hit the most popular things first. if you want shop or just mosey around, you can do that later.
3. Use Fast Pass wherever you can - saved us a ton of time when it came to waiting. The Disney Photo Pass is awesome too. They have photographers stationed around that will take pics of you guys and they get saved to a card that you carry around. Then you can use that card to get pics on CD, etc.
4. If you decide to do the Bibbity Bobbity Boutique thing, save it for toward the end of the trip, in case your daughter decides she just can't have it all undone. I heard a story about a mom whose daughter had it done the first day and then refused to shower, wash, undo the hair, etc. She said by the end of their trip, daughter looked like "Belle on crack". The barber shop in Magic Kingdom does do a mini version of it for a lot less money.
5. HAVE FUN! Sometimes, you are just going to have to give in and buy the $10 Mickey Mouse balloon or whatever. It's totally worth it. Enjoy every minute. Savor it as much as you can. That's so awesome you get to surprise her like this and at the time you are going, it shouldn't be that crowded either. :)