Let's Say Thanks is a website set up by Xerox that allows you to pick a design for a card, enter your name and hometown, and then pick a thank-you message. Xerox will then print the card out and send it to a soldier overseas. It's free and there's no personal information collected other than your name and hometown.
Everyone who reads this should go send a card or three. There's no excuse not too and it has the potential to make a difference in some soldier's life.