Better pay, more joy in the job, or prerequisite to promotion? Whatever your reasons for deciding to build expertise in a new field, the question is how to get there.

Your goal, of course, is to become a swift and wise decision-maker in this new arena, able to diagnose problems and assess opportunities in multiple contexts. You want what I call "deep smarts" - business-critical, experience-based knowledge. Typically, these smarts take years to develop; they're hard-earned. But that doesn't mean that it's too late for you to move into a different field. The following steps can accelerate your acquisition of such expertise.

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