My 2 are in their early 20s now.
We didn’t do Elf on a Shelf like it is now, I don’t remember it being quite such a big thing back then. We did have a little stuffed Pixie that brought advent calendars on 1st December and then lounged around the house until Father Christmas picked her up on Christmas Eve. She just kind of sat on various shelves/curtain poles/etc and the kids would love coming down and spotting her in the mornings.
No to Christmas Eve boxes but they did have new pyjamas on Christmas Eve (just generic new pyjamas). We would tell them that Father Christmas sent a scouting party of elves ahead to check children were getting ready for bed. The new pyjamas that magically appeared on their beds while they were in the bath would mean that Father Christmas was on his way.
We left out a beer and a mince pie, DD1 insisted on leaving out a whole bag of carrots so all the reindeer got one, not just Rudolph.
We visited Father Christmas, usually a local one but a few times we went to London to Selfridges and then took them to see the lights.
We did baking, gingerbread house decorating, and all that kind of stuff.
Didn’t go together to pick out a tree, I’d love a real tree but I’m allergic to them but we did (still do) go and buy a new tree decoration every year and decorate together. We’ve got a kind of mismatched tree of random decorations now but they love seeing all the once’s they’ve picked over the years.
Yes to stockings - we still do - Father Christmas brings stuff like new pants, chocolate, a couple of toys, colouring pens and bits and bobs like that (now it’s vodka and skin care products) and then main presents are under the free from the person who buys them.
I made advent calendars that we reused every year. Mostly had stuff like chocolate coins in, but we’d add cinema tickets for a Christmas film, ice skating, visit to Father Christmas and stuff like that as well.
We still do a lot of it now, DD1 moved out with her boyfriend and DD2 is at uni this year so some stuff has come to an end (although DD1 is carrying a lot of our traditions into her own home)