I play Christmas music and watch Christmas movies. Also I buy presents for my friends and I wrap them. I decorate the tree and the house. I basically enjoy the Christmas spirit! In our family on Christmas eve we are allowed to open one present early too.
Have my own x-mas in my house, then later (around 10:00) I go nextdoor to my g-ma's and have one there, then later we go to one of the other 5 houses, host is voted on, in my family and we go there!
I party at my house because it is also my Mom's birthday on December 25, and we excitedly open all the Christmas presents and enjoy them the moment we get them!