Entrepreneurship Leadership and Management Continuing a day in the life of Sierra Commons, Nevada CityMay 9, 20100Comments by Ruth Schwartz Shhhh…. let’s sneak into the conference room and see what types of things can happen in Nevada City, CA’s business incubator, Sierra Commons. Meet Cognizant Productions and Sonika Tinker. business development Nevada City Nevada County Ruth Schwartz Ruth Schwartz is the author of "The Key to the Golden Handcuffs". She is a high performance business consultant and leadership coach. Connect with Ruth to participate in the conversation. Google+, Facebook, Twitter, YouTube .