With all the ways of communicating in today's world, the hand written notes are becoming a thing of the past. That is unfortunate because they can be a very powerful tool in the business arena. Think back to when you last received one. How did it make you feel? Whenever I get one, I know that the person who wrote it took time out of their day to focus on just me, if only for a few minutes. It's much more personal than an email or a text message. Those types of communications have their place, but if you really want to build a relationship or make a lasting impression, the hand written note is the way to go.
I came across this post that gives an example of how powerful this tool can be. Be sure to read the comment from David Lorenzo at the end of the post.