NEW YORK – MARCH 17: Shoppers line up inside Trader Joe’s for the grand opening on 14th Street on March 17, 2006 in New York City. Trader Joe’s, a specialty retail grocery store, has more than 200 stores in 19 states. (Photo by Michael Nagle/Getty Images)

Freakonomics did a podcast on Trader Joe’s strategy and company culture.

The Big Idea: ignore competitors and focus on your customers; hire for cultural fit.

How is Trader Joe’s different from competitors?

How is Trader Joe’s doing vs competitors?

What are the key lessons for companies?