DC are 21 and 19 now so a load of ours have been changed but the ones that remain:
Gorgeous little Advent tree with a decoration in each door of the handpainted cupboard . Its as old as DS and still makes an appearance .
Dec 1st Hampers instead of Christmas Eve . Underwear , socks , new pyjamas (Winter not Christmas ) a robe if they need one .
Chocolte advent calendar
Some toiletires for DS
DD has a Beauty Advent Calendar I make for her . Day 1 and Day 24 are the Big Ones
Shopping Day for DD and I usually London (not last year though)
We go to the theatre (London , something like The Play That Goes Wrong / Christmas Carol )
DH and I book a day off end November to go shopping together and have lunch .
Christmas Dinner is late , after dark . Candles on the table ( LED ones now with the cats )
DS likes money so we don;t buy him much (he gets his Dec 1st Hamper) his birthday is December too . No point spending for the sake of it . I put money in a Christmas book one year 
Watch "Lost Christmas" (Eddie Izzard film and now also "Last Christmas" (really cheesey rom-com written by Emma Thompson )
Decorations don't go up till after DS Birthday
Christmas towels , Christmas Toilet Paper, spicey handsoap in the bathroom/toilet
Christmas teatowels and Christmas straws in the kitchen on Dec 1st .
TV Times and 4 highlighter pens
Used to do a Christmas Eve photo when we had guinea-pigs .(with hats on a Christmas fleece , they had vegetable trimmings for supper . Brussel tree and windy little GP 2 