my first "xmas" tradition is to never write "xmas", and always call it Christmas, despite being a nonbeliever, because being PC is for fruity tree hugging liberal ######bags 
Actually a tradition I had up until they put in the TNG cast was to get together with a few of my nerd friends and watch all of the Star Trek movies back to back to back etc. Sadly we all drifted apart with work, families and such, however I found a couple of them on facebook and one of them suggested we try it again this year, so we might revive it.