Learn how to use those fast passes and how many you get, as it's not always clear (you get more than 3 a day).
When a ride is saying there are no fast passes soon just keep refreshing it and usually one can pop up.
Make sure to use those fast passes for princess meet & greets & Fairyland Hall, the line may look short but we got stuck in one for a long time.
EDIT: LOTS of time meeting princesses and characters with a almost 3 year old. Which reminds me, take your kid before they hit 3 because they're free.
Meet Disney characters @ Big Top at Pete’s Silly Sideshow. You can show up usually 10 minutes before it opens and get within the first 3 people.
We were first once and Daisy, my daughter's fav, opened the door and led her by the hand all the way in....she still talks aboot it!