Film... back in the days of using a camera, and no PhotoPass or whatever they call it now. It was MK day, DD was 7, and we were headed to Cinderella's Castle for breakfast. MK charged $10 for a 12 exposure roll of film!
We had to buy warm clothes one year when the weather took a turn. The annoying part is, we live in Maine. We had our warm jackets, etc., with us but left them in the car at the airport; who needs mittens in Disney World? We ended up buying sweatshirts, fleeces, or hoodies at WDW- NOT a cheap proposition, but limited everyone to the sale racks so it wasn't as bad as it could have been! Note to self: Bring something warm if you are traveling Nov-March, just in case!
Learned the hard way about bringing an extra credit card. We put EVERYTHING on our credit card and pay it off monthly; churning SW cards and having Disney VISA rewards points help shave off a big chunk of our vacation cost. ANYHOW... We'd been at AK all day, hot and sweaty, and went back to BWV to cool off and change before going out to dinner. On the way, we stopped at Hess to get a nice, icy cold drink, and of course I used my Disney VISA card to pay for it. We went to dinner (charged to our magic bands/hotel account), spent the next day doing whatever. Late that evening I discovered my card was missing! Remembered where I'd used it so went over to Hess to find my card. Nope, not, nada. Hess was closed. Not just closed, but shut down, with a chain link fence across the entry/exit, and the fuel tanks were dug up! We had to cancel the account- but the catch was that DH and I share the account, so HE didn't have a usable card, either! FORTUNATELY DD21 had a separate card so she charged everything for the rest of the trip as I had contacted Chase and closed the account! Lesson: Bring a back-up emergency credit card! (Chase was amazing, BTW, and offered to send a new card to us within 36 hours! We declined- I didn't want a glitch to occur and then be headed home before the card arrived- but they were really great!)