From now, and until the first part of November, every time you send a card to a family member or friend, take a Christmas card from the back of your box.  Spend a few minutes writing a brief note in their Christmas card.  Put the card in an envelope, stamp and address the envelope, and put it back in the box.  By Christmas, most of your cards will already be addressed.  You’ll just need to add any further thoughts, seal the envelope and pop it in the mail.