Ah, the old 'Who To Send Christmas Cards To' dilemma. Having just narrowly avoided being the only person in work to send a card to the boss (by not sending it, at the last minute), my heart has just about slowed to its normal rate. However, we're on the last posting day before Christmas, so as always I'm a little nervous - if someone unexpectedly sends me a card, there is now nothing I can do about it until next year.
There's a considerable group of people with whom I have an every-other-year exchange of cards, which works as follows:
*Year 1: They send me a card and I don't send them one. They strike me off their list and I add them to mine.
Year 2: I send them a card and they don't send me one. They add me to their list and I strike them off mine.
Subsequent years: repeat from * indefinitely.
So it was with delight that I discovered this.