January - Find a consistent spot to put cards so you can find them in December
February - Don't forget to sign and date the back of your cards
March - Envelopes! Make sure you have envelopes for all your cards.
April - Get a head start addressing! Address envelopes with at least your return address
May - Buy some forever stamps before May 12, 2008, so you can pay a penny less per card for mailing a Christmas card come December (current postage
41cents... will go to 42 cents).
June - Go back and look over the last 5 months of cards. Make sure everything is done and that they are holding together. Sometimes adhesive has a mind of it's own.