Tim Ferriss, author of the best-selling books, The Four Hour Work Week and the Four Hour Chef lives life like a giant science experiment. He conducts research, interviews hundreds of thought leaders in varying industries, enacts their ideas and best practices in his own life and reports back what he learned from the experience. In this interview, Ferriss gives SUCCESS Editor-in-Chief Josh Ellis his own definition of success: "I don't use the word success very often. I can certainly take a stab at it at some point and I am often asked how I define [it], but I prefer to chase excitement… [Excitement] is a better barometer for whether you're heading in the right direction." Listen in to hear how you can use Ferriss’ newest book, Tools of Titans as the foundation to experiment and find your specific version of excitement in life.