When the kids were young we always took them to the cinema and then for a meal and to visit the living nativity (in a farm near us), now they are older and we don't have to work around santa, I will do a few bits in the kitchen if we are at home, put some Christmas music on, watch a movie,sometime I go to midnight mass, depends, we are not always at home and spent one Christmas Eve in New York
and have spent it in Ireland with my Mum or at a hotel, it varies we don't have a set routine now.