For true entrepreneurs, there is nothing more exhilarating and satisfying than launching your own baby into the economy, nurturing it, and watching it flourish with co-founders, friends, employees and supporters along the way. Satisfying, that is, until your co-founder starts to slack, develop a different vision, or simply become an energy suck that is destroying the business.  Once the honeymoon start-up phase is over, founders either thrive in the get-down-to-business phase, or get itchy for the next creative start up adventure.  Here are some big-picture tips for handling the post-honeymoon phase.