Evey year I seem to find a new Christmas song that really does it for me. Couple years ago it was Dave Matthews Christmas Song. Last year it was Sarah Maclaughlan (man, how do you spell that) with Song for a Winter's Night.
This year the winner is Fairy Tale of New York. Track it down, but get the version by The Pogues, not the one by Pilate, which does nothing for me at all.