Around 1st Dec, we go down to the storage unit and get out the first box of Christmas stuff - the advent calendar that DM made for DD when she was a baby, Christmassy fleece, Christmas bedding for DD's bed, plastic Christmas crockery and a couple of Christmas mugs, and the DVDs and books. They get used from then on.
We always go to see the "Live Crib" whenever we get a chance to go into the city centre - DD used to need to go see it daily when she was in crèche nearby, and its still a favourite now that she's almost leaving primary!
I always take a half day at some stage and bring DD into the city centre, for her "Christmas Shopping" trip. She doesn't usually need to buy much (actually, she's usually finished by then herself) but may still need to get something for DH. It's mostly an excuse to people-watch, visit the live crib, and enjoy a naice hot chocolate/bun together before getting the bus/train home (that's an important part - no driving home that day!). I try to not have anything I am specifically buying that day myself, unless we pick up something that we see in passing, it's all about DD.
We have mostly gotten out of the habit of reading to her in bed. Except in December, when we have to read the adventures of the "24 petit souris avant le Noel" (24 small mice preparing for Christmas). They do something nice every day, and I have to read it en francais and then translated to English.
On Christmas Eve afternoon, we bake cookies for Santa (sometimes from scratch if we have time and energy, others just "slice and bake" from a half batch of dough I put in the freezer earlier in the month). I am normally peeling veg if we are staying home that year.
On Christmas Eve evening, after dinner, we get out the hamper. As the youngest, DD lights the Christmas Candle (Irish tradition) and we have a few moments thinking of the good and bad in the past year together, and people not around for Christmas anymore, then say a prayer together.
Then DD opens the hamper itself, for new PJs for everyone, naice hot chocolate, lush bath bombs, and old favourites reappearing such as her stocking, Snowman hot water bottle cover and Twas the Night Before Christmas. She lays out the stocking and snack for Santa (Cookies she baked and milk, and a carrot for the reindeer) and then heads off for her nice bath and fresh pjs, before we read TTNBC to her in bed.
Mostly, for us, it's about making sure we get to spend time together over the break from school and work. We're a mad busy family and have a lot of activities all the time (I am a Cub leader in DD's Cub pack, and DH travels a heck of a lot for work and wider family reasons, DH and I both work FT). We also need to travel either for Christmas or after it to see the wider family as we live in a different city - we rent a cottage for a few days if going down for Christmas itself as both houses are way too hyper and there's no escape otherwise.