Stress and burnout are costing U.S. business as $300 billion a year.

The disengagement of employees, because they're exhausted and running on empty,

costing them $500 billion a year.

So we're not talking about opinions or anecdotes.

We are talking about hard data.

Welcome to No Limits.

I'm Rebecca Jarvis. Each week, we're talking to women

playing at the top of their game. Founders, actors, athletes, chefs, comedians, musicians.

Bottom line, these are women who win. So, how are they doing it? We're taking you way beyond the bios,

looking at their struggles, triumphs, risks, biggest mistakes, and some of the worst advice they've

heard along the way. Whether you're looking for answers or you just want to hear a good story,

you're in the right place.

My guest today has one of the most incredible, enviable, and transformative life stories I think I've ever seen. It begins in Greece, where she grows up in a one-bedroom apartment with her

mother and sister and a dream of studying at Cambridge. A dream that seems far-fetched

to many, but making far-fetched things, extraordinary things happen, becomes a constant throughout

her life story. At 16, she goes to Cambridge on a scholarship and gets her master's in economics.

From there, she goes on to write 15 books, starts a family, creates the

Huffington Post, gets named to one of Time Magazine's 100 most influential people, and if that

wasn't enough, she founds another company, her latest Thrive Global, her mission to make sure

you get enough sleep. Arianna Huffington, welcome. Great to be with you.

When you think about your past, growing up in Greece, did any of this cross your mind at that time?

Did you envision any of this? No, of course not. And that's really what is amazing about life,

...