We have a few. Here are some, I'm sure I;ll forget some!

I am cheif tree decorator and do the tree and mums with my neice, nephew, DS and DD on the first weekend of Dec. Then come home and do our little unit and tree up here.
Get out the chrissy DVD's, CD's and books for the kids. Watch and re watch, and re read and re read the books and DVD's and sing the songs at the top of our lungs for a month or so!!
Have our close family dinner on chrissy eve with just my mum and brothers and our families on chrissy eve. Open our pressies to each other now. Sleep at mums.
Have extended family over for lunch on chrissy day.
Make chrissy paper with DD adn DS. Some painting and drawing for this purpose has already begun!! Using chrissy colours of course!
Have santa pics, though DD is petrified of santa, so I don't know how we'll go this year!

I'd like to start a few more like making hand made gifts (food hampers...) for people like my aunties and nan with my kids. And making my own chrissy cards with the kids pics on them, dressed up in chrissy attire of course! I love christmas!