Like everyone said get to the park for Rope Drop. For an 8am opening, you want to to be at the park entrance by 730am. I usually get the VQ for Web Slingers at 7am, then head to the park or entrance.
You basically want to be as close to the rope (near the Carthay), so you can make Radiator Springs Racers your first stop.
If the line for rope drop heading to Cars Land is crowded when you get there and before park opening, you want to go get in line for Soarin Around the World.
Park opens, ride Soarin, then walk through Hollywood Land and head to and ride Guardians. You should be done with both of these attractions by 840am.
Your GOAL is to be in Pixar Pier before 9am. For example, if you are in the park at 830am, ride Guardians then head to Pixar Pier. If you are in the park at 845am, head to Pixar Pier
Now head to Pixar Pier, ride Toy Story Midway Mania first, then Incredicoaster, then Pal Around. It should be close to 930am at this point. Now ride Goofy's Sky School and Symphony Swings. Goal is to be out of Pixar Pier by 10am.
Ride Grizzly between 950am-1010am.
If you do not ride Racers first, then that is a ride you are going to have to wait. Anything that is 45 minutes or less for Racers is good to get in line at.
If you ride Racers first, cut across to Guardians and ride, then to Pixar Pier and follow the direction above. Soarin will be the line you will need to wait in. Just wait for the app to say it is a 30minute or less wait.
Don't worry about the Web Slingers return time. You can join that line at anytime once it is called. I just wouldn't wait for it if the line is past the main entrance to the attraction.
ME