I often feel that the idea of Thanking people for gestures of kindness has completely gone out the window. Please do not get me wrong, I never do anything for anyone expecting anything in return; but I was brought up that you thank people for gifts and general gestures of kindness. Not that I need to be thanked for every little card I send, but it is nice to know that someone received the gift or item- especially if you sent it in the mail.
Thank you notes, do people even send them still? I love snail mail, and always will. I will also encourage my future children that it is the right thing to do.
I actually have a sign hanging in my cubicle that says this:
Just a small reminder that people do not have to help you and when they do it should be recognized.