The only thing special we do is spend the day together
My sister and her family come up at Thanksgiving and we have our Christmas with them then so when Christmas actually arrives, it's just mye, hubby, our boys, my mom, and my younger brother. We go to church on Christmas Eve together (unless hubby is at the fire station, then it's just me, the boys, and my mom). We go home and have something light for supper then watch a movie together or play cards. Christmas morning, it's time for presents! Each year, I try to make a treasure hunt out of at least one of the boy's gifts - they really enjoy the "hunt"
I plan to do the same thing again this year and will probably continue to do so until they are out of the house.....then I'll do it with any grandkids. Then, later in the day, my mom and brother come over along with my younger sister and her 2 kids and we'll open gifts, eat, and just be lazy - the boys will usually play football in the yard unless it's raining. When the time comes that my mom is no longer with us, I'd like to go to the mountains for Christmas - I think that would be so much fun!