I have pared things right down over the years , my DC are 25 and 22 so Christmas with Adults rather than children
I do Dec 1st Boxes for my DC ( Ha Ha Shoot me ) as they can use them in December .
Pyjamas ( winter not Christmas )
Loungewear for DS
Underwear ( I buy a years worth of trunks and white sport socks / black work socks for DS )
Make-up and toiletries for DD - she'd prefer to have this in December , especially nail polishes
Their Christmas presents are small and (hopefully) thoughtful . DD had jewellery . DS likes money .
Everyone has winter (not Christmas ) bedding , there's Christmas handtowels , drinking straws , shower curtain, Snowman LooRoll . No compromise on these !
We have Sainsbury deliveries , this is the first time we had a Christnas delivery , it made such a difference . I usually go into the shop IRL but the few times I have done in the year , I struggle with the Self Check Outs . I went in Christmas Eve for vegetables , there were no manned checkouts !
The Nectar Points are used for the Big Shop .
DH,DH and I went on a Christmas Market trip in December which was lovely . Short break, decorated ship, chance to dress up . DS doesn't do this sort of malarky , he was House and Cat Sitting .
Our Christmas was quiet , we'd done the festive bits but didn't need to force DS to get involved .
I did make epic roast potatoes and Yorkshire Puddings though 
Christmas Clean-A-Long so you do a bit at the weekend it is good to get a job done that I;ve been putting off . Having a list is good incentive .
Wrap presents before the 23rd ( I did mine on the 21st )
I have bought myself a money tin again - used to put in £2 coins but this year I;ll put in £5/£10 a week and it is safe till I open it .
I work up to 23rd , then the week between . That way I don;t get the "Urgh back to work its January and I've been used to having a lie in"