One of the most important gifts we can give to another human being is that of acknowledgement. People feed off of other people and knowing that someone out there cares. Think about this for a minute.
How does it make you feel when you get an unexpected call from a friend just to say they were thinking about you? Or just to say "Hi!” It has a powerful effect wouldn't you agree?
I think we all have a basic human need to be appreciated by others. You see when we take the time to write a quick note, make the call or simply send a quick e-mail we are in turn filling the needs of those around us. We make others feel good by letting them know we took the time to acknowledge them.