Mirrors my own!
All I would add to it is:
lime green ribbon to wear so your fellow DISers can spot you and say hi!
Your own coffee and/or travel coffee maker - depending on where you are staying they may provide the coffee maker - but charge a small fortune for each package of coffee you use OR they don't provide one and if you are like me - I need a cup or two BEFORE I am ready to walk to the food court and fill up my refillable mug! LOL
We also bring a small atomic clock - travel size. It sets itself from radio signals and you just change what timezone you are in and VOILA - instant VERY ACCURATE time. This is particularly important for us because we always travel there during the first week of April and the time changes to Daylight savings while we are there... wouldn't want to be late for anything!
Extra glasses and contact lenses.
Swim goggles for the pools and waterparks - particularly if you are a contact lens wearer like I am... you will enjoy the waterslides MUCH more if you do not have water splashed in your soft contacts and they are floating around in your eye!
That's about all (for now!). Sorry, I get carried away.

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Disneyland - several times - most recent 1998
CBR - 2000
DXL - 2001