This was our touring strategy pre-FP+ but we try to stick to this:
Enter MK, hop on the train to Frontierland. Grab a FP for BTMRR or Splash and ride the other while waiting for the FP return time. (If need to kill time, hop over to Tom Sawyer Island). Use FP. Hop the train over to Fantasyland. If no lines, ride the Barnstormer. Go to Space and grab a fastpass. Go on Laugh Floor and Stitch. Grab FP for Buzz. Ride Space then Peoplemover and Carousel of Progress. Time for Buzz! Walk through the hub and grab a FP for Peter Pan. Ride Philharmagic. Time for lunch at Columbia Harbor House. See Hall of Presidents and, if time allows, Country Bears and/or Tiki birds before going back to Peter Pan. Head back to the resort to rest, change. Late afternoon, head back to MK and ride Jungle Cruise, Pirates, (maybe a detour to BTMRR) Haunted Mansion, IASW, Carousel (no line, no waiting). With the introduction of New Fantasyland, now is also the best time to see Storytime with Belle and Ariel. If short line, hop on Winnie the Pooh. Head back to Buzz to defeat the evil Zurg!