While I was playing with the whole mobile phone thing I explored the site and found you can check FastPass times and availability in real time. It will give you the current wait time or tell you to go there right away. Anything you want to know is available on this site so check it out while you're on the go inside the parks. This is a great way to move away from huge shifts in the crowds.
Here's another tip. The best times to visit the rides is during traditional meal times, during parades, and especially when the firework shows are on. Of course if you want to see them it's a priority but if you are visiting for extended days and have already seen them it's a strategy that's worked for me for a lot of years. Hope you have a great stay at any of our parks!