Pick a fandom and read. (Be warned, two of the three are non-explicit slash.)
Seasonal Hazard (SHERLOCK BBC): Sherlock and John are retired and living in Sussex. It's Christmas time. There are carolers. ...Remember - this is Sherlock we're talking about. Slash, non-explicit.
Seuppernatural, or How the Winch Stole Christmas (SUPERNATURAL, DR. SEUSS): "A Very Supernatural Christmas," retold in the style of Theodore Geisel. Gen.
The Season (THE SENTINEL): Jim and Blair hang apples all over the loft instead of holly or trees, because December 25 is Isaac Newton's Birthday. Blair gets all academic about holidays. Slash, non-explicit.
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Stay warm, dry and well-fed. Peace of the season, and the promise of renewal that comes with a new year.