It's pretty common that in any given group, the subset of people who have good ideas and the subset of people who are comfortable dominating a group conversatio

It's pretty common that in any given group, the subset of people who have good ideas and the subset of people who are comfortable dominating a group conversation are not entirely the same. One strategy that I've found is sometimes helpful that recognizes this fact is to start group decision making by having everyone write ideas down independently on sticky notes for, say, 5 minutes. This means every person present ends up with a physical representation of the fact that they have ideas, sitting in front of them on the table. Then, in a second phase, you can put them on a board and organize them, evaluate them, vote on them, etc. Since the ideas are now sticky notes on a board, they can be evaluated (more) independently of the person who articulated them. The first time I participated in something like this, it felt like Kindergarten, and I didn't really appreciate it. But after some practice, I've come to appreciate that it gives every member of a group the chance to contribute ideas, without having to simultaneously finesse the holding-the-floor game.