My day would be like this:
Be at the opening of the Studio's Park and run like crazy for Crush's Coaster, then use fastpass on both Tower of Terror and Rock'n'Roller Coaster. I'd also do Stitch Live! in English and finally CineMagique.
This would then end my time in the studio's, in a single day time would be at a premium, therefore I'd skip the rest of the Studios park as the
Disneyland Park would offer better value for money. Depending on the time, it would either be Annettes Diner or Casey's Hotdogs for a quick sopt of lunch.
In the Disneyland Park, I'd attempt to make the best use of the time. This I'd imagine would be done by going clockwise around the park, starting (obviously) on Main Street, then to Frontierland, etc.
Starting off in Main Street, I'd head straight down the Arcade, simply becuase they are not found in any other park and they would help to beat any traffic on Main Street, straight into Frontierland and to the fastpass section of Big Thunder Mountain, on to the Phantom Mannor. Hopefully after Phantom Mannor it would be time for the Big Thunder Mountain fastpass. After this it would be on to Indian Jones.
After two fast rides in a row it's time for something a bit more leisurly and a stroll through Adventure Isle and then on towards Pirates of the Carribean. After leaving Pirates it's time to collect a fastpass for Peter Pan and then on through Alice's Labrinth to It's a Small World. Back to Peter Pan in time for the fastpass and now on to Discoveryland via Le Château de la Belle au Bois Dormant. In Discoveryland it's Space Mountain M2 for me and then onto Buzz Lightyear Laser Blast (mainly because I haven't done this one)
Finally back to Main Street, if there is a Main Street Vehicle waiting then jump on, if not a final leisurly stroll up Main Street, jumping on the Train if there is any time left in the day for a final view of the park before leaving.