Hello! I've been to Disney World 15 times (in a row) so I can give you some amazing tips!
TIPS:
My first tip,is if your phone carrier is Verizon,and your phone is compatable,take the time to get the Disney Parks Mobile Magic application installed on your phone. This app really worked wehen I last went to Disney World! It will automatically track down your location at your resort,theme park,and land that you are currently standing in.This app can also track where the characters are via Navigation and even give you wait times for rides and fastpass return times (also,if they are availible) It also comes with a free map for the park,which on the map,will let you know where your standing (This is so you can find a better route to the place you need to be at)
My next tip,is to go on popular rides (Splash Mountain,Big Thunder Mountain,Space Mountain etc.,) when Parades or Fireworks are going on.Mostly the whole park will be watching,so its a great opportunity to get on those High-Demand rides with little to no wait!For example: The Main Street Elecrtical Parade was performing,and me and my sister got on Splash Mountain in less than a 15 minute wait!.
STRATEGIES:
Try to manouver around the park in a circle,thats the best option.I'd say,start off in Tomorrowland,move to Fantasyland,Liberty Square,Frontierland,then Adventureland! This way,you dont need to go out of your way and then go all the way back across the park to go on another ride! Its plain and simple! =D