Wake up, exchange presents, get really stoned, go to my mom's and open presents, then go to my grandma's to hang out, drink, open the presents from her, and eat all day. I don't normally smoke pot but during the holidays I usually do because I used to love it when I was younger and with the time off of work I figure I can get away with it.
My little brothers and I will usually snowboard the day after christmas too. It's super busy at the resorts but it's still fun. If there's enough snow on christmas we'll break out the quads and pull eachother with sleds on ropes and try to wreck the person on the sled into some sort of massive pile of snow, lol.