The seven best tips from the seven worst CEOs of all-time

Editor's note: This blog was written by Zac Bissonnette, author of the new book Good Advice from Bad People: Selected Wisdom from Murderers, Stock Swindlers, and Lance Armstrong. The Daily Ticker's Aaron Task interviews Zac in the video above.

Complacency in the C-suite is dangerous, and when a CEO seems to be taking a victory lap, investors should get nervous. A 2007 New York University study found that shareholder returns tend to decline after a CEO builds his trophy home and other research suggests a similar decline in performance after companies build lavish new headquarters.

While researching my new book Good Advice from Bad People: Selected Wisdom from Murderers, Stock Swindlers, and Lance Armstrong, I noticed another trend: There are an awful lot of management guides, self-help books, and speeches delivered by CEOs at the apex of their power — right before their kingdoms turned into dumpsters, and they traded the keys to their Ferraris in for prison jumpsuits.

Fortune 500 CEOs, even crooked and/or inept ones, are generally well-spoken oracles of advice. Here are the top seven tips from seven of the worst CEOs of all-time:

“The only barriers in your career are self-imposed.” – Al Dunlap

Chainsaw Al Dunlap was, at one time, one of the most respected CEOs in America. His tough, take-no-prisoners approach to cost-cutting made him an icon of the 1990s, and his book Mean Business: How I Save Bad Companies and Make Good Companies Great

was an instant bestseller. When he was hired as CEO of Sunbeam in 1996, the stock surged close to 50% in a single day. But in 1998, the whole thing collapsed under the weight of management mistakes and aggressive accounting. Dunlap was fired, the company went into bankruptcy and in 2002, Dunlap settled SEC fraud charges by paying a $500,000 fine and an agreement not to serve as an officer or director of a publicly-traded company for the rest of his life. Not that anyone was asking him to.

“As an impresario, I encourage and elicit contrarian views and contrasts. . . It’s important to place tension between points of view to extract the best from people. Dissent stimulates discussion, prompting others to make more perceptive observations.” – John Sculley

As CEO of Apple (AAPL) from 1983 until 1993, John Sculley worked hard to brand himself as a thought leader and management icon. His 1987 book

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as a bestseller, even though The New York Times called it “severely overwritten."

But when Sculley placed tension between himself and Steve Jobs, arguably the most creative man in the history of the world, he extracted the worst from the situation. The two were locked in a power struggle and when Sculley learned that Jobs was plotting to have him ousted, he went to the company’s board of directors. The board stripped Jobs of his management responsibilities in response, and Jobs left the company in 1985. Sculley was fired in 1993.