I'll be away working for a month over the period, so I've already started my preparations as I've volunteered to be Santa on the ship. The preparation being not shaving and eating chocolate biscuits, so I can be fully prepared with beard and belly. Red boilersuit and I'm done.
At home we found the perfect Christmas dinner was bacon sandwiches when the kids were younger and just carried the tradition on. They were always more interested in presents than eating, and we were more interested in being with them than spending hours cooking something nobody was that bothered about. Then off to parents for more presents and some sort of buffet thing.
We do the turkey thing on Christmas Eve instead.