Yeah, it sounds like a lot to keep track of, but as Pedro mentioned, many of these things are actually combined on the same card.
Key to the World Card (KTTW): A Walt Disney World or
Disney Cruise line room key. KTTW cards can have park passes coded on to them, and can also be enabled for charging purchases to your room account (this must be done at check-in), and can have your dining plan coded onto them as well.
FastPass slip: A small slip of paper (about 1.5"x1.5") printed by the FastPass machines. These slips are like reciepts; they have the ride name and your return time printed on them.
Magic Your Way ticket: A basic Walt DIsney World park pass. Credit-card size, with a magnetic strip, these passes come in both hard plastic and soft Tyvec (often called paper, though they are not). MYW passes bought outside WDW can sometimes be coded onto your KTTW card so that you wil only have to carry the one card.
Disney Dining Experience (DDE) card: DDE is a membership program available to Florida residents and WDW Annual Passholders. Requiring a yearly fee, the DDE entitles the bearer to a 20% discount at most WDW restaurants. DDE cards cannot be coded onto KTTW cards, unlike the
Disney Dining Plan, which is an optional part of a WDW vacation package.
NOTE:
MYW Park Passes and KTTW cards have magnetic strips on them, but the cards themselves do not actually store ANY information other than the serial number of the card. All of the relevant info (how long you're staying at a resort, how many days of park pass you have left, etc.) is stored on the WDW computer system, just like your bank balance is stored on the bank's computer, not on your ATM card.
This means that when you are issued a KTTW card, if you lose it, you can get a new one issued to you at the resort and have the lost one cancelled out of the system; all you need to do is show your ID. Of course, this makes it a good idea to carry your ID with you at all times when in the parks!
This can also be done with MYW park passes (at ticket windows or Guest Relations windows at one of the 4 theme parks or at Downtown Disney), but in order to do it, you need to have the passes serial numbers. The best way to do this is to make a photocoppy of the pass before you leave home and keep it in your room safe while at WDW.
TIP: Carry your various cards in one of these 97-cent lanyards from
WalMart for easy access and protection from rain and water rides: