I find it interesting to see how other professions think about planning. Planning is not a marketing or business discipline. It’s been around for much longer than we thought. It has implications in a broad set of disciplines. Here’s two Navy SEALs explaining why you should not overplan to the point of not even executing your idea because you’re spending too much time thinking. Focus on 1-3 contingency plans and make actual progress on your project.

Navy SEALs Jocko Willink and Leif Babin explain why it's important to plan, but not overplan. In their book "The Dichotomy of Leadership," Willink and Babin describe what it takes to be a good leader, both in the military and in business.