Biking
In the summer of 2009, upon graduating from Business School in Arizona, I went on a 4300 mile Bicycle Ride around America to raise money for http://www.actionagainsthunger.org/. It was an amazing experience that I chronicled at http://www.liveforthepath.com.
Looking back, I think I could have done a better job with my writing for the trip, as it is a bit dry as is. But I learned a lot, not only about my writing, but also about the country and myself.
I am always on the lookout for the opportunity to go on another trip via bicycle. You see the world in a way that you can't understand if you have never done it. I miss being on the bike in the world every day