Everyone does things differently, there's no right or wrong way to do Xmas. Just this way I know I can really relax and enjoy the day. We do have a pretty low key Xmas though and we don't host anyone.
Wrapping - I do I over the month rather than all at once or the day before.
Gifts - all hidden under our king ottoman bed so easy to access, kids no clue the bed even lifts. Bigger gifts in the garage or at grandma's collected on Xmas eve.
Stockings - yes, these need to be done in the middle of the night, not found a way round that yet! I know some people do duplicate stockings and just switch them out which is genius!
We leave a cookie & milk for Santa. Dp and I always sqaubble over who's biting Rudolph's carrot. No believers this year though so not sure if we'll be doing that part.
Food prep, I do as much as possible the day before and get an online delivery usually the 23rd. Dessert is certainly bought in for ease, but it's only 4 of us. Nobody is even that bothered about turkey and the kids hate roast dinner, one year we had a mexican feast because that's what we like and this year we're getting a Chinese takeaway! We will have already had a Xmas meal with extended family on the 22nd and a boxing day buffet so we don't feel like we're missing out.
The day itself is about new toys and silly games and selection boxes! The DC can even disappear to their rooms with tech for a while if they like, I love Christmas but don't put too much pressure on it being the traditional/perfect day. A clean, organised house for one day a year makes me happy though.