Photo: Courtesy of Polly Letofsky/ Newcastle Productions

At age 37, Polly Letofsky broke up with her boyfriend, rented out her condo and sold nearly all of her worldly possessions -- all so she could walk the globe and raise breast cancer awareness.

In total, she trekked 14,124 miles across 22 countries in North America, Australia, Asia and Europe, at an average of 15 miles per day for 1,825 consecutive days, or five years. As she raised more than $250,000 for 13 breast cancer organizations, she burned through 29 pairs of shoes.

Find out the lessons Letofsky learned on the road and how she prepared mentally and physically for her journey.