The folks at Xerox have a neat program. If you go to their site you can pick a card that they will print up and send to a soldier serving overseas. The cards are all drawn by children. You can personalize it with one of several pre-written messages or write one of your own.
Whatever your political views, please consider taking a minute to thank these wonderful people celebrating the holidays away from their loved ones as they honor a commitment our country. Sending a card will literally take you less time than it took you to read this post.