I don’t pre cook any of my food before Christmas because I see it as a Sunday Roast with more veggies and ‘bits’ and I have a thing about food being ‘fresh’.
But what I do prep is the kitchen and dining table. We don’t eat breakfast at the dining table on Christmas Day so I can lay the table at any point after dinner on Christmas Eve.
I rearrange the fridge so everything is easily accessible and grouped together. And, the most useful bit for me, I plan the serving dishes and serving spoons etc. They are laid out with post it notes saying what goes were. For example, gravy in the big gravy boat, cranberry sauce in the small sauce boat, Brussels sprouts in this bowl, parsnips in that bowl.
That saves me a huge amount of faffing on the day and makes it easy for any ‘helpers’ in the kitchen. I really can just concentrate on the cooking.
Also, a list of running times working back from when I want to eat/serve is essential. If you have a standard white fridge, try writing this using a whiteboard marker on your fridge. It’s awesome! You just wipe it off as each stage is completed.
2pm - serve
1.55 - make gravy
1.55 - veggies out of oven
1.30 - turkey out of oven to rest
1.25 - turn potatoes
…
…
…
10.00 - turkey in oven
The key is to include every single step.