Morgan Mercier

For David Goggins, childhood was a nightmare--poverty, prejudice, and physical abuse colored his days and haunted his nights. But through self-discipline, mental toughness, and hard work, Goggins transformed himself from a depressed, overweight young man with no future into a US Armed Forces icon and one of the world's top endurance athletes. The only man in history to complete elite training as a Navy SEAL, Army Ranger, and Air Force tactical air controller, he went on to set records in numerous endurance events.

Minimalism is the thing that gets us past the things that clutter our lives so we can make room for life's most important things - which actually aren't things at all. At age 30, best friends Joshua Fields Millburn and Ryan Nicodemus walked away from their six-figure corporate careers, jettisoned most of their material possessions, and started focusing on what's truly important.