Book excerpt: A guide to help managers prepare for whatever comes over the net In tennis, the player with the fewest unforced errors usually wins. The same is true in business- all too often, the mistakes that sabotage a career are completely avoidable, if you can anticipate them early enough. Bestselling management writer Jeffrey Krames adopts the metaphor of tennis to show how to spot and sidestep the types of faults that do the most damage. He shows how businesspeople can develop and practice good habits so they'll be ready for an unusually fast serve or wicked backhand. Drawing on stories about famous CEOs like Jack Welch, Robert Goizueta, and Lou Gerstner, Krames shows how to avoid some of the biggest "career killers." His advice includes: Never say, "The ball was out by a mile"; face reality at all times. Choose your doubles partner carefully; bad people decisions (hiring, firing, promoting) can be fatal. Keep practicing your best shot; enhancing your strengths is more effective than trying to fix your weaknesses.