Best-selling author Danielle Steel has published 179 books and says she writes 20 - 22 hours a day

To become as prolific an author as Danielle Steel, you'd need an almost superhuman level of energy and very, very little sleep. The 71-year-old writer, whose work has earned her a Guinness World Record for spending the most consecutive time on a bestseller list—390 weeks or 7.5 years—told Glamour that she works 20 to 22 hours a day. And when's she feeling behind, a full 24 hours.