Tim FerrissAmerican entrepreneur, investor, author, podcaster who became well-known through his "4-Hour" self-help book series.

For me meditation or mindfulness practice is about decreasing emotional reactivity so you can proactively create your day and create your life; versus, just being a walking reflex that sometimes screws up

Paul McCartneyVocalist, songwriter, composer, bass player, poet, and painter whose known for his work with the Beatles.

In moments of madness, meditation has helped me find moments of serenity — and I would like to think that it would help provide young people a quiet haven in a not-so-quiet world.

Bill GeorgeFormer Medtronic CEO who now teaches at Harvard Business School.

The very best time to meditate is on a plane. I have to go to Europe a lot. If I land at 8 a.m., meditation gives me an opportunity to get deep rest and refocus before my board meeting at 10.

Oprah WinfreyActress, author and philanthropist who is best known for her talk show, The Oprah Winfrey Show.

Although I'm a big proponent of formal meditation — for the discipline, joy and calm it brings — I'm moving into an even greater phase of being fully present all the time. It's a heightened state of being that lets whatever you're doing be your best life, from moment to astonishing moment.

Steve JobsFounder of Apple who transformed the company into a world leader in telecommunications.

If you just sit and observe, you will see how restless your mind is. But over time it does calm, and when it does— that's when your intuition starts to blossom and you start to see things more clearly and be in the present more.

MadonnaAmerican singer, songwriter, actress, and entrepreneur referred to as the 'Queen of Pop'.

Meditation showed me how much energy silence has.

Jeff WeinerFormer CEO, now the Executive Chairman of LinkedIn.

One of most powerful benefits of meditation (and greater awareness) is ability to improve issues that may have previously gone unrecognized.

Bob StillerPresident and CEO of Green Mountain Coffee Roasters.

If you have a meditation practice, you can be much more effective in a meeting. Meditation helps develop your abilities to focus better and to accomplish your tasks.

Ray DalioFounder of Bridgewater Associates which is the world's largest hedge fund.

The act of repeating a mantra, which is just a sound, and then transcending into the subconscious mind not only brings a peaceful and a healthy state of mind, but it also taps the subconscious mind, which is where the creativity comes from.

Jerry SeinfeldAmerican actor who is best known for playing a semi-fictionalized version of himself in the sitcom Seinfeld.

I've been doing Transcendental Meditation for over 40 years. Doing TM will help you to take things more easy.

Ariana HuffingtonCo-founder of The Huffington Post; Founder and CEO of Thrive Global.

A big part of my morning ritual is about what I don’t do: when I wake up, I don’t start the day by looking at my smartphone. Instead, once I’m awake, I take a minute to breathe deeply, be grateful and set my intention for the day. Then I do 20 to 30 minutes of meditation and 30 minutes on my stationary bike, on days when I’m home. I also practice yoga most mornings.

Bill GatesFounder of Microsoft and formerly the richest person in America.

Meditation is simply exercise for the mind, similar to the way we exercise our muscles when we play sports. For me, it has nothing to do with faith or mysticism. It’s about taking a few minutes out of my day, learning how to pay attention to the thoughts in my head, and gaining a little bit of distance from them.

Marc BenioffCo-Chief Executive Officer of Salesforce.com, one of the biggest software companies in the world.

I realize I’m not the same person I was 22 years ago. But I am here, right now. So I just realized, OK, what can I do right now? How do I come together right now in this moment as a leader? And meditation helps me answer that key question.

Padmasree WarriorFormer Chief Technology and Strategy Officer at Cisco Systems

Just because you’re leading one of the biggest computer equipment companies on the planet, doesn’t mean you have to be constantly plugged-in. At the end of each day, mother-of-one Warrior apparently turns off all her electronics and finds 20 minutes to meditate.