The most productive leaders never lose sight of the problem they're trying to solve and have strategies to keep their team involved, writes Microsoft's J.D. Meier. Success comes when teams are focused on their strengths, ask the right questions, dump perfectionism and limit their hours. "[O]ne of my best managers forced me to set a limit of forty hours. This meant I had to ruthlessly prioritize and focus throughout the week to flow the most value," Meier concludes.