I can't say enough how much I love the Amazon style of disttill your thoughts into a doc (doesn't have to be long) then schedule a meeting where everyone gets time to read it first and comment inline, then discuss. As you scale out your influence this helps even more. Even friendly readers should take a bit of a grader/devil's advocate approach and call out anything that can improve. Any qq they ask a later person, less in the loop or more skeptical because they have their own ideas person will definitely ask. So fix those sections and your doc and your written communication skills will greatly improved through iteration.

Also you get bit the distilled document that can be reused later (big win of written) and the high rate communication of a live meeting. And focus.