Rather than buying Front of the Line passes, I'd recommend heading to the park right when it opens and going straight over to the Simpsons ride. Then go see Shrek or Terminator. By the time you've done that, the lower lot should be open (where the other rides are), so head there and go on Jurassic Park and Mummy. While you're down there, do Backdraft and the Special Effects stages. Then return to the main lot and do the Backlot Tour. Finally hit any shows that are left which you still want to see.
Using this strategy, I make it through everything I want to see at the park (Simpsons, JP, Mummy, Backdraft, SFX, Shrek, Waterworld, Terminator, Backlot Tour) easily, usually finishing around 2 in the afternoon, just in time for a late lunch on CityWalk.
Walt Disney World's Magic Kingdom
Disney's Animal Kingdom
Disney's Hollywood Studios
Disney California Adventure
Universal Studios Florida
Universal's Islands of Adventure
Universal Studios Hollywood