A good thank you note is warm and personal, even if you have a hundred to write. Plan to send your thanks within 3 months of receiving a gift. Then buy yourself great stationery (with your new monogram!), find a cozy place to sit, and invest in a good pen -- it will make all the difference in your penmanship.
Be specific about each gift and if you receive a check, don't mention the sum, but definitely indicate how you'll put the money to good use. Above all, remember to speak from the heart. Happy Thanksgiving and thanks to Brides.com!