The Meyers-Briggs Type Indicator is widely used in organizations and by individuals. You have likely encountered it yourself. If not, you can read summaries on Wikipedia and in this article by Howard Ditkoff. The sixteen types are described in detail on Typelogic.com.
In this post, I will provide suggestions for improving your communications with folks of a different type. (You may want to know your type before reading further. If so, here's a free on-line test.)