Since leaving graduate school, in 2002, I have always done my best to continue my pursuit of knowledge. Whether it be of a practical nature, or academic, I often seek out those who are an inspiration to me and the dreams I am pursuing. The links aren't in any particular order, just as they have been remembered.
For those looking to build a business in fine art photography, or photography in general
Brooke Shaden - Fine Art Photography: The Complete Guide
Life lessons from some of the world's most influential people
Tim Ferriss - Tribe of Mentors
Discussions of conservation, hunting, land management, and tales from the American West
One of the best explanations of Bitcoin I have yet to hear - Highly recommend subscribing to the Kevin Rose podcast, as well