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Not only is Beth's health better, so are other parts of her life. "I am taking time for me. I'm taking time to work out," she says. "I am spending time with my children. I'm attending to their needs. My daughter is 16, and she was so excited—for the first time in 16 years she has a stay-at-home mom. She thinks it's the best thing in the world."

Marcus says the lesson here is that while Beth has many strengths, she was not using them. "She's so darned talented," he says. "She's got an amazing design talent. Being able to step 20,000 feet above a situation, see all the moving parts and reconfigure them into the most effective pattern—she's genius at that. What she's rotten at is implementation."

This is a common business problem, Marcus says, where someone who's good at one thing is assumed to be good at something else. "You were a good basketball player, therefore you'll be a good coach. You're a good salesperson, therefore you'll be a good sales manager. You're a good individual contributor, therefore you should manage others," he says. "It isn't necessarily so."

Just because she was bad at implementing business strategies does not by any means signal that Beth is finished. "You have so much to contribute to the world," he says. "You need to stand up and own that."

Follow Beth's progress on her blog.