The Disney Destination News provided these tips for using My Disney Experience:
Linking Theme Park Tickets
Tip #1 – Before linking Theme Park Tickets, you should set up their additional party members in the ‘Family and Friends’ section. Once this has been completed, you should assign one Theme Park ticket to each of the party members in the drop down list.
Tip #2 – If you have multiple tickets linked to your account, your should contact the Help Desk or stop by Guest Services to learn what order the tickets will be used when entering the Theme Parks. It may not be in the order they were linked.
Tip #3 – If you are not using personalized MagicBands, be sure to write the names of each party member on the RF-enabled card. Knowing which card belongs to which person will help you enter the Theme Parks and the FastPass+ lines more quickly.
Making Disney FastPass+ Selections in Advance
Tip #1 – When you book a stay at a Walt Disney World Resort hotel, you can make FastPass+ selections up to 60 days prior to check-in for the entire length of your stay, just like booking dining reservations.
Tip #2 – Those of you that purchase tickets before they arrive can choose their FastPass+ experiences up to 30 days in advance of each day of their theme park visit.
Disney Resort hotel Guests receive a MagicBand included with their stay to make their vacation more fun and convenient than ever before. MagicBands are also available for purchase at select merchandise locations.