Petraeus speaks during a news conference in Washington in January, as White House adviser Elizabeth Warren looks on. Jay Mallin/Bloomberg via Getty Images hide caption

itoggle caption Jay Mallin/Bloomberg via Getty Images

Lisa Howland says her husband, Randy, smiles a lot more now that he's working, even though the job doesn't pay enough to cover all their bills. Tamara Keith/NPR hide caption

itoggle caption Tamara Keith/NPR

Many entrepreneurs are earning money from posting how-to videos on YouTube on a range of subjects including tying ties. iStockphoto.com hide caption

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Annica Trotter prepares for a day at work at her new job as a receptionist. Tamara Keith/NPR hide caption

itoggle caption Tamara Keith/NPR