Happy Mail Resources
Order Stamps Online - USPS.com
Check out Jennifer McGuire's post on building a Birthday Index Card Box to help you stay on top of mailing out those cards.
Kimberly over at For the Love of Paper has started the New Year off with a bang, with her new Ultimate Inspiration Calendar for Card-Mailers. Each month she'll release a new calendar page. Go download the January page right now. Kimberly is also the mastermind behind the Mail it Monday campaign to encourage more people to send Happy Mail!