No matter what your position on the wars we are involved in, the state of the country, or the military overall, we have hundreds of thousands of service men and women away from their homes and families right now so that we don't have to be. While I may disagree with the politicians, I have infinite respect and support for our military service members.
This site allows you to send a postcard to a service member. It literally takes a minute--choose a card designed by a child, then either choose a pre-written message or write your own, and tell them where you're from and your name (I put 'A Grateful Mom'). That's it. One minute of your life to brighten the day of a service member.