Orignially written in 1985 and revised in 1999, Six Thinking Hats offers interesting techniques to effectively manage any decision making process. While written for those in a corporate environment, the principles can be useful for major personal and career decisions. By using a individual hats metaphorically, De Bono outlines a focused and systematic path to define the issue, separate facts from emotion, assess risks, uncover new options to arrive at an ideal resolution for the given situation. If you're looking for a quick and stimulating read with great examples of how to begin using this "thinking process" immediately this is a must read.
