Hooraaaay! This is the thread for me!
I did do a proper full on Nigella Christmas before DS was born, but I remember being pretty unimpressed at the time; I slaved for hours over homemade gravy and red cabbage flavoured with pomegranate and I thought "I couldve just bought this fucking lot from M&S".
So the following year, I did. Which was lucky considering DS was only 12 weeks old!
The only thing I really do is bathe the turkey in a Christmassy brine; it takes about 20 minutes and it's now something of a tradition. Plus the children can get involved chucking all the ingredients in and it's quite nice that way to get them involved in some Christmas food prep that doesn't involve boiling hot goose fat! I'll happily copy the recipe on here if anyone wants it? It does stop the turkey drying out in the oven and makes me feel important 
My best friend makes the booziest Christmas pudding in the world and gives it to me, so that's that done.
The roasties in a tin from M&S are just the best thing ever. £4.99 I think I paid last year and they were lovely. I'm buying 2 packs this year just so I can cook them off and pick at them later .
IMO, no one gives that much of a shit about the veggies. They want meat overload and bollocks to your colon health.
I also get an M&S pre-done honey ham for Boxing Day to have with more roasties and perhaps some token cabbage, that went down well last year.
Getting a prelit tree from John Lewis this year; last year we went to B&Q for the tree and it was like Day of the Triffids in our house the sodding thing was so massive. The top of the tree was actually bent on the ceiling 