Whether you believe in an afterlife—as I do—or not, by being fully present in your life and in the lives of those you love, you're not just writing your own eulogy; you're creating a very real version of your afterlife. It's an invaluable lesson—one that has much more credence while we have the good fortune of being healthy and having the energy and freedom to create a life of purpose and meaning. The good news is that each and every one of us still has time to live up to the best version of our eulogy.

This book is designed to help us move from knowing what to do to actually doing it. As I know all too well, this is no simple matter. Changing deeply ingrained habits is especially difficult. And when many of these habits are the product of deeply ingrained cultural norms, it is even harder. This is the challenge we face in redefining success. This is the challenge we face in making Third Metric principles part of our daily lives. This book is about the lessons I've learned and my efforts to embody the Third Metric principles—a process I plan to be engaged in for the rest of my life. It also brings together the latest data, academic research, and scientific findings (some of them tucked away in endnotes), which I hope will convince even the most skeptical reader that the current way we lead our lives is not working and that there are scientifically proven ways we can live our lives differently—ways that will have an immediate and measurable impact on our health and happiness. And, finally, because I want it to be as practical as possible, I have also included many daily practices, tools, and techniques that are easy to incorporate into our lives. These three threads are pulled together by one overarching goal: to reconnect with ourselves, our loved ones, and our community—in a word, to thrive.

Excerpted from Thrive: The Third Metric to Redefining Success and Creating a Life of Well-Being, Wisdom, and Wonder by Arianna Huffington. Copyright © 2014 by Christabella, LLC. Excerpted by permission of Harmony Books, an imprint of the Crown Publishing Group, a division of Penguin Random House, Inc. All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.