Zero is such an intimidating number 
I’m miles from zero but trying to cut back.
This year I’m asking people what they want rather than buying what I think they might like, and cutting out novelty gifts completely. And I’ve also got a few suggestions of useful things I’d like in case I’m asked.
I’m already pretty good at using up the leftovers so not worried about food. But I won’t be buying extra sweets and goodies as we get lots of gifts.
I don’t use disposable trays or kitchen roll now. Having had a few crisis Christmases I won’t say I won’t use pre-packaged sides but it’s not plan A.
I also help the dc make gifts, and I’ve done a re-think about that. We’ll do baking and some plant gifts but nothing that involves glitter or turning things that could be recycled into landfill! We’re going to make some spring planters for the grandparents and we’ve potted up some strawberry shoots from our garden.
A lot of our decorations come from outdoors and get composted afterwards.
I love wrapping paper and anyway have lots of it to use up. I’m going to try wrapping without ribbons or tape you tube
I would love to cut back drastically on the dc’s gifts but I don’t really know how to manage their expectations. However, they don’t get huge amounts, and it isn’t tat. If they see stuff that they like when we’re out and about I snap a picture so that I can pass on suggestions to relatives who want to buy stuff. At least then it tends to be something they want rather than random bits. I try and steer them away from tat as much as possible and while we’re over run with lego and books they have a good second hand value.
I’m still using too much packaging and air miles ordering stuff online, not to mention the amount of packaging that food and gifts come with. I try, where I can, to avoid this in my normal shopping but it gets away from me at Christmas. And cost is a factor in it too.
In terms of child pleasing home made stuff baking and chocolate treats go down well. Chocolate dipped gingerbread men are yummy!