I deep clean and then put up trees.
This weekend the upstairs will get deep cleaned.  The tree, mantle in our bedroom and Christmas bedding in our room will go up next weekend. Also, next weekend the first floor will get a good cleaning.  The trees in the living room, kitchen, dining room,and sunroom might also go up that weekend or I will wait until the following weekend.  
Its a lot of work, but I enjoy it.  I want to enjoy it for as long as possible.  Everything comes down by New Year's Eve.