Love love love Disney! Been there about a dozen times with the hubby and kids. Take advantage of the early morning/late evening hours at the parks that the hotels offer to people who are staying on property.
* Year of a million dreams is still going on.....for some of the bigger prizes, there is registration online. You can win a night at the castle (very cool!) or cruises, big prizes. Keep an eye open for these people at the park. (i.e. cotton, button down shirts, short sleeved in white or light blue-they sometimes have a big, round sticker on their briefcase) You can win immediate give-aways (they walked up to my daughter and gave her two keep-sake pins for her collection; I won a shopping spree for a shirt of my choice!)
* If you are going to Fantasmic, my best advise is book a dinner through one of the few restaurants at MGM who offer a package deal. These meals aren't any more expensive than other meals that you will purchase. (I know one restaurant is "Brown Derby", another is "Mama Melrose"-Italian (?) -I think that's the name. Doesn't cost anymore but they have a special section that they seat people and it avoids the cattle-run that happens before Fantasmic.
* We have learned that two days of Disney needs to be followed by one day away at the parks (or just go to a park for only two hours that night for the evening events). You want to do it all but the pools are wonderful and Disney is overstimulating for the parents too. It's amazing what you can accomplish in a day with a good map person and time management skills - that's my husband. He keeps us on track! Our Disney best record is 15 hours and 20 minutes at the parks and we still all liked each other!
*Good suggestion someone gave for the fast passes - use them wisely. Go get your fast pass immediately when you enter a park if it is a ride that you must go on. We wanted to go on SOARING - if you delay getting a fast pass in late morning-you may have to wait until early evening to be able to utilize that fast pass time. (you can hold two fast passes but, I think two hours has to pass before you can attempt to get a second-if you haven't used the first-worth checking on!).
* See a 3:00 pm Magical Kingdom parade-sorry lots of crowds but it will make you smile (and when you go on "It's a small world ride" - see how long it takes to get that song out of your head!)
Have a fantastic time - wonderful times await!