Annual Passes - Why would I want one for a 2 week holiday you may ask?
If you plan to visit more than once in a 12 month period it is worth considering buying an annual pass, especially as they include free parking which is currently $25 per day at all parks.
Even if only visiting once, it may still be worthwhile considering one pass for the free parking and food and merchandise discounts so check the parks websites for price before buying your tickets.
My Disney Experience
This service allows you to link your family’s tickets into a single account at the mydisneyexperience website from where you can book / amend your fast pass tickets in advance or even amend on the day if something better comes up. There is no charge for the service but it's recommended you take advantage of the fast passes as you initially get 3 per person per day to book in advance after which you can then make 1 additional reservation at a time until all passes have run out for the day. The mobile app also tells you important information such as park opening hours, show times, and current wait times etc.