Jeffrey A. Krames, author "The Unforced Error: Why Some Managers Get Promoted while others Get Eliminated"

In my career of nearly three decades, I have had a front row seat to countless number of unforced errors in the workplace. Much to my surprise, I have witnessed egregious, stupid errors made by people I regarded as the smartest, most effective of colleagues.

So what kind of tennis mistakes also translates to your life and career? Consider the following:

CareerBuilder.com writer

The average American spends a lot of time at work -- more than 1800 hours a year -- but do you love your job or are you frequently daydreaming about being somewhere (or anywhere) else?

M. Wolfe for AOL Find a Job

To fuel their growth in today's competitive market companies are increasingly seeking the fresh perspectives of recent college graduates and other entry-level employees. What are these entry-level employers looking for in candidates? How do you make them look your way?

By RACHEL ZUPEK, CAREERBUILDER.COM

Vince Thompson was willing to do whatever it took to make his company successful. He shifted from sales management to leading sales training when the need was there, and when the company asked him to run its Southwest territory, he relocated for the position.

"The knowledge I needed to change positions did not come from my predecessors or even bosses," Thompson says. "It came from mentors and colleagues within the company that were vested in my success and willing to teach more and provide honest feedback."

By Alexandra Levit

When I landed a job in a top public relations firm after my college graduation, I thought the toughest part of my entry into the business world was over. I dumped my extra résumés in a recycling bin and eagerly awaited a paycheck that would scarcely cover my rent. I looked forward to worldly business trips, stimulating office brainstorms and hanging out with my co-workers every Friday at happy hour.