My mother always made Chex mix and I plan to do that for Christmas. I might even make fudge. The reason: going through the motions makes us busy and happy. It also reaffirms that we seniors matter and can still enjoy our life even if we are alone.
Granted two sounds nice, but it is not always the rule. And family may not always be a good choice if there is animosity there. Many movies have been done on the "joy" of celebrating holidays with families that have issues.
So I am going through the motions of Christmas, too. I will send Christmas cards to friends, make Chex mix, trim a small tree, decorate as if someone important is coming, watch my favorite Christmas movies, thaw out my "Christmas turkey" and generally enjoy the life I have - even if I am alone.
I am going to continue going through the motions until the New Year. I may even get a split of champagne to celebrate a new year of life and make a few New Year's resolutions. Cheers!