I like the idea of writing down all ideas and then hashing through with some rules of thumb such as 'could we really make this?'.
A lot of this does remind me of ways to get through a work meeting.
I myself don't lack confidence at work, and end up probably annoying the hell out of people, but I do try to listen, make a point to even tell the real loud mouths to hold off when one of the quieter folks is trying to get a word in edge-wise.
...as an aside, this reminded me of a specific meeting where I was trying to describe a process to a group of people via a diagram on paper when this one guy interrupted me to try to get the paper and draw it himself, so I literally had to hold down the paper on the table and probably looked like I was trying to protect 'my precious'; I was a bit over the top about it, trying to inject some levity, and everyone laughed, but I thought, are you REALLY gonna just take this paper out of my hand because you are sooo in need of control??
As to saying something in the form of a question, although I have consciously done it when necessary, it sure is annoying to have to do an end-run around somebody's ego that way! Sheesh!!
More clear/assigned duties & rotation of duties are great ideas too; thanks all! eager to see if there are any more insights.