Really want to make a difference? Make sure this word is part of your vocabulary: thanks. It's pretty simple - when someone does something for you, however big or small, say thanks! When people say it to me, it really makes my day.
During the course of the week I do various volunteer efforts and I really enjoy giving of my time and hopefully helping the life of other people. I don't have any great expectations of something coming my way as a result of what I do, but you know what? I get something often - a thank you!
Wow! It's really hard to describe, but when someone indicates that they appreciate what you just said or what you just did, that is a pretty special feeling. I'm going to try to be more conscious of saying it myself.