Starting a business is difficult work, and may be one of the greatest challenges of your life. Not only is there great planning to be done, but the actual research of evaluating your product and its potential market is often more time-consuming and complicated than many “green” businessmen and women fully understand. That’s why Evan Kimbrell, a former venture capitalist and founder of *digital service agency Sprintkick, developed*How to Come Up with Killer Business Ideas.