Have you got all PS's made? If not, do that. I also would check Steve Soare's site and track the show times at the park, so you can have an idea about when to see the shows you want. For instance, last week and this week Beauty and the Beast at MGM didn't have a show until 2:15. We had only planned on being in the park in the morning, and then coming back for Fantasmic. We had to change our plans so we could see this show (and see Four for a Dollar, the preshow). I start buying snacks about two weeks out. Granola bars, jerky, gum, cheese and crackers. Great things to eat while walking across the park or riding the monorail and busses. I also start checking the weather, but that just makes me crazy. The ten day forecast is never right. Weather can change so quickly in Florida, I would restrain from doing this if at all possible.
Have fun!!!