Plan for huge lines and prepare to avoid them.
Be at the park gate for opening, 30 minutes early.
Use FP as much as possible. Remember you can get your next FP when the return window opens or two hours later, which ever comes first. If you can't come back during the return window they are still good to use. Many people save them up and use them in the afternoon and evening.
In the afternoon, take a break if you are staring in a nearby hotel. If not, do attractions like Tom Sawyer Island, Redwood Creek Challenge Trail, Captian EO, Aladdin and Bug's life. Things that cycle to let huge groups in or don't have lines to stand in.
Eat early or late so you don't wait in another line for food.
Stay until the park closes as lines ease after the fireworks.
Save shopping until after the park is closed.