Arrive early for everything.
In the summer time, the park opens early, but they don't officially post it. Be at the gate at 08:00am even if you have FOTL. You can knock out Marvel Island in 15 minutes if you go in first, and you can get front seat rides on the coasters.
Eat lunch at 11:30am.
8pm is rush hour at the Citywalk restaurants, try to eat dinner at 6pm.
Stock a cooler before checking into your hotel.
In all the trip reports I've read, when the people show up early, it's a good trip report. When they show up at 11am, it's a bad report.
That's ok if you get there late on your first day after flying down, just expect huge crowds until the tired leave around 5pm.