In the 11 years since Zappos was founded, we’ve had to make some big decisions. One of the most significant came in early 2004, over lunch at Chevys, a chain Mexican restaurant in San Francisco. We hadn’t expected to make a life-changing choice over a plate of fajitas, but when you’re part of a fast-growing company, a lot of decisions arise at unlikely moments.

A version of this article appeared in the July–August 2010 issue of Harvard Business Review.