When one of the most successful company in the history (Google) performs such a management shake-up in order to rediscover its start-up roots, you have to wonder how your company is doing. 

As it has grown into the dominant company in Silicon Valley, Google, 24,000 employees, has lost some of its entrepreneurial culture and become a slower-moving bureaucracy, in contrast with Facebook, Twitter and other younger, more agile competitors.  (To counter this, in April Larry Page, its 38-year-old co-founder will take over as CEO from Eric E. Schmidt, a veteran manager who was brought in a decade ago to provide adult supervision.)

"One of the primary goals I have is to get Google to be a big company that has the nimbleness and soul and passion and speed of a start-up," Larry Page said.

Despite its financial success, Google is no longer considered by many top engineers as the most desirable place to work in Silicon Valley. A new generation of start-ups has surpassed it. 

In other words, when recurring strains remain in your company (or in the company you work for), you must get back your entrepreneurial drive, no matter how big is the management shake-up.