I had written most of this book unknowingly over the years. Then it took another intense one year and a half (outside the Firm) to further synthesize, clean up and come up with more meaning and implications. It started with a suggestion—that I publish this. Then it became a wish. I wished something like this existed for me when I was learning: short, handy and practical. Then it became a reality. I was fortunately able to find a publisher who also liked this idea.

Aside from my own wisdom I learned at McKinsey, I sought wonderful advice from talented individuals. At the onset, I wanted the interviews to distill what I had learned and give a richer sense of what was more important. Then as the interviews grew and details ensued, ...

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