The short list:
Comfortable, well-broken in shoes.
Band-aids and moleskin for feet.
Sunscreen.
Rain ponchos.
A light jacket.
Tylenol for the inevitable aches and pains.
Any other essential medicines.
Novemeber is not 'cold' by most people's standards, but every day isn't shorts and t-shirt weather, so a couple pairs of long pants and shirts wouldn't be out of order. Those above are the bare essentials I wouldn't try a Disney vacation with, but there's a ton of other things to bring, here's some I'll be taking with in a few weeks:
Camera, batteries, charger, memory cards.
Mp3 player and headphones.
Pop tarts (for in-room quick breakfast)
Water bottles.
Fanny pack.
Disney Dollars (spend 'em if you got 'em)
VISA Disney rewards card
WDW official guide book
That's a pretty good list there... of course one must bring the other things that are always brought on travel, those listed above are Disney-specific things (or generally, for travel involving lots of walking and sight-seeing).