Wait times and Fastpasses.
Have you downloaded the My Disney Experience App to your phone yet? If not, please do. I suggest to all my clients to download and start checking it out. You will notice what rides and what times the lines build. This can help you pick your Fastpasses.
Here is a link to Disney with more in depth use of the Fastpass and setting it up. https://disneyworld.disney.go.com/help/fast-pass-plus/
The My Disney Experience App (MDE) has wait times in real time for the parks. You can check it out before and DEFINITELY use it in the parks. No need to go to a ride to find out the wait time.