I've just been doing some food shopping, mostly stuff for Christmas. I've already amassed quite a lot and when my husband commented on it I reminded him that the first (and last) time we ever hosted at Christmas we were well fed until Boxing Day and then completely ran out of food. We were out all of the next day and by the time we remembered we needed food everywhere was closed. We ended up feeding my parents pre-packed sandwiches from the local garage.
We were crying with laughter remembering that, but I was mortified at the time.
So go on, make me feel better and share your own Christmas fails.