When I hear people say, 'Ideas don't matter,' it just drives me crazy. The idea is the most valuable thing you have when you start, and the best ones are the result of a tremendous amount of work, effort, experience, and insight. They're unique and almost magical by nature. Great ideas hold the energy that can propel a team forward through the tremendous uncertainty you face when you first get going. Often times, the idea defines the mission of some of the most important companies in the world.