Comment by nickpeterson

One issue is that people can agree on a general vision but differ completely on what problems exist, how they could be resolved, and what series of decisions support each other. It becomes overwhelming for people to think about.

Focus on writing down your thoughts and supporting them. Build a case for something and then make decisions and execute. If you can put together a cogent argument, even people who disagree can often stomach working hard on it as long as you acknowledge their criticism and occasionally reevaluate past decisions.