Where should I live? Is it time to get a new job? Which job candidate should I hire? What business strategy should I pursue?

We spend the majority of our lives making decisions, both big and small. Yet, even though our success is largely determined by the choices that we make, very few of us are equipped with useful decision-making skills. Because of this, we often approach our choices tentatively, or even fearfully, and avoid giving them the time and thought required to put our best foot forward.

In Smart Choices, John Hammond, Ralph Keeney, and Howard Raiffa--experts with...