YY proper sellotape (I buy the ScotchTape (regular and gift tape) from Costco - each one in a plastic dispenser with a cutting blade. Much easier than a roll of tape.
Decent scissors to cut paper ( mine all vanish
)
The past few years we've learned by experience not to overbuy food.
But buying bottles/cans/packet food in advance and storing the bottles/cans of drink in the garage helps a load. I don't want to be hauling heavy trolleys round.
And not forgetting what utter c**ks people can be in supermarkets in the run up to Christmas 
When the decorations come down this week, some of the lights will have to go (my lights on the upstairs landing were only about 75% working. I did try them, they worked , but when I'd actually wound them round the swag, I saw that some weren't working at all. Too late/too lazy to undo them <img loading="lazy" class="inline-flex mumsnet-emoji" alt="Blush" src="https://www.mumsnet.com/build/assets/blush-Brh13p-7.png"> )
I'll scrutinise what has to get thrown out (decorations) or recycled via Charity Shop if they're in good condition.