100% on your lists 
I have a filo-fax style diary so I can move pages and dispose of any old ones and replace them.
I do a page where I just write things as I think of them through the year so my food lists are Buy Ahead/ Buy Last Minute
A page of Yes Buy Again/Cook Again and one of Don't Bother
Everyones presents on a list
We have Sainsbury delivery , go to Costco every couple of months and a trip to Waitrose a couple of times a year .
Buy things like washing up liquid, bin bags, washing powder , dishwasher tablets, foil , baking paper when you see a special offer then you've got a stock of them.
Handwash and towels.
Big serving spoons and tongs ( I got some stainless steel ones from Nisbetts catering after my silicone ones went all sticky
Tins,jars that you know you'll use and they'll last (though I had a disaster with a bargain pack of Pepsi that was in the garage and when I went back to them they'd frozen and burst !)
I don't freeze much ahead but I do like a couple of .meals put away like lasagne or chilli .
Plan your meals - what you'll cook , what you'll buy
If you have storage and hiding spaces
Do the Christmas Clean-a-Long (it will inspire you , honest
)
De-clutter , do a room or task every week from September .
Plan what things you need to book for , if it's a day out with the DC or Panto , they go on sale so early .
My DC are adults . The past couple of years we've done a trip away early Dec for DH,DD and me .. DS doesn't do Christmas , he house sits .
I do Dec 1st Boxes so they can use them all December which DD likes .
Then Christmas for us is quieter which is nice .
I like the cooking as long as I have peace and all my utensils .