Are you getting enough shut eye? An article in Harvard Business Review recently referred to a survey of more than 180 business leaders. It revealed that four out of 10 (43 percent) of these leaders do not get enough sleep at least four nights a week. Such sleep deficiencies can undermine important forms of leadership behavior and eventually hurt financial performance.

If you're not getting enough sleep, follow these tips from The Sleep Revolution by Arianna Huffington.

  1. Set a cool room temperature.

  2. No electronic devices starting 30 minutes before bedtime.

  3. No caffeine after 2 pm.

  4. Pajamas, nightdresses and even special t-shirts send a sleep-friendly message to your body. If you wear it to the gym, don't wear it to bed.

  5. Do some light stretching, deep breathing, yoga or meditation to help your body and your mind transition to sleep.

  6. When reading a book, make it a physical book or an e-reader that does not emit blue light.

  7. Ease yourself into sleep mode by drinking some caffeine-free tea.

  8. Before you turn off the lights, write a list of what you are grateful for.

Try these tips for a good night's sleep and feel the positive results for your business.

Source: Arianna Huffington is the author of The Sleep Revolution: Transforming Your Life, One Night at a Time. She is also the founder of The Huffington Post, the founder and CEO of Thrive Global, and the author of 15 books. She has been named to Time magazine's list of the world's 100 most influential people and the Forbes Most Powerful Women list.

Compiled by Cassandra Johnson