I'd say there's a division of labour in this household - whether you consider it fair or not, I leave to you ...
We do plan everything together. Mrs O has called for a final meeting to be convened this Monday. A planning meeting usually involves me following Mrs O taking down instructions, rather like one of those generals you see, with their notebooks out, poised behind Kim Il Un.
Xmas cards - we each have our own list to write (Mrs O's is longer) but I buy the cards, stamp them and ultimately post them. We're actually down to just 31 this year ....
Presents - Mrs O plans most of them and wraps them, but I post them off. The exception is my S, who visits us on Xmas day, and for whom we traditionally provide a goodie food hamper. We have a lot of fun in going out and buying all the jars and bikkits and wines together.
Decorations - I get them out of the garage, Mrs O puts them up. But it's only a 4' plastic tree, decorated with a string of lights and baubles, crib scene, and absolutely nothing in the way of lights attached to the house, as I'm a zealot about the electric bill. In recompense, I provide Mrs O with an evening tour around the estate and local area by car so she can gawp at everyone else's - and there are quite some displays out there this year, though, we remarked, not as many as in previous years.
Meals - we set a festive menu and I do 95% of all the food shopping. The other 5% (I.e ordering the turkey crown) we do jointly. We also go out for a quiet Christmas lunch ourselves in December. On the day, Mrs O will mastermind the cooking and I'll be on hand to help out if required. Otherwise I will be deemed to be "getting in the way".
I think our watchwords for surviving Christmas are - (a) start early in November and (b) keep it simple ....