If launching a business is so tough, why aren’t more entrepreneurs limited to founding just one or two? According to an article in today’s Forbes.com, it’s because start-up success can be habit-forming. HarQen CEO E. Kelly Fitzsimmons is one of the “serial entrepreneurs” featured. She talks about how, like any other habit, practice makes perfect in the world of start-ups.

The Rise of the Serial Entrepreneur by Jessica Bruder makes this point while listing six talking points for start-up CEOs. One is shown to the left: “You should prove that there’s a market — a need, or a problem out there that you will be solving.”

Kelly has a proven knack for delivering real business solutions, most recently through the harnessing of original voice. She is also featured for her advice on managing multiple tasks — and learning from disappointments. Here’s an excerpt, which begins by talking about the advantage gender can bring to using time efficiently:

Serial entrepreneurs must juggle tasks and competing priorities efficiently, something women have been doing since the dawn of time.

Third-generation serial entrepreneur E. Kelly Fitzsimmons can relate to the multitasking temperament. She’s currently running her fourth company, HarQen, which creates software to collect and organize a wide range of spoken messages …

While still in her 20s, Fitzsimmons launched two information security companies. One was acquired by Neohapsis, an information security consultancy, but the other was crushed in the dot-com collapse, devastating Fitzsimmons’s finances.

“I failed so hard and I failed so badly that it totally shattered me as a person,” she recalls. But hitting rock bottom had an upside: It gave Fitzsimmons a toughness and humility she hadn’t had before. (”I didn’t die,” she recalls.)

By the time Fitzsimmons founded HarQen, two things had happened: She found her fear of failure had dissipated and realized that the high-energy pursuit of another startup was just what she needed.

In a blog post from March of this year, Kelly elaborates on this — and even turns it on its head, suggesting that we really learn far more from our successes than our failures.