After Disney's Hollywood Studios open, Immediately get fastpasses for the new version of Star Tours. Once you go your fastpass, go to either Rock N Roller Coaster or The Twilight Zone Tower of Terror. The waiting time for both attractions are 10 to 15 Minutes long.
After you ride on both of them, you check and see if it's time to use your fastpass.
If it is, go back to Star Tours and use your fastpasses right away.