If you have ever worked with others or if you know a person who has, you owe it to yourself to read Robert Cialindi's "Influence: The Psychology of Persuasion."
To buy it on Amazon.com, click here: http://www.amazon.com/s/ref=nb_ss_gw/104-0020555-3331171?initialSearch=1&url=search-alias%3Daps&field-keywords=Influence%3A+the+power+of+persuasion&Go.x=8&Go.y=10
I can't say it enough: We are all teachers. We are all in sales. We are all in customer service. So read this book. It will help you at work, as a volunteer, and at play.
Use the link above, and Amazon will donate up to 8% of your purchase price to http://www.naplessocialaction.org/. We could use the help!