There’s a number of things that can help. One thing we rely on is establishing ground rules as a team. If someone is not obeying ground rules such as going on a tangent or not letting others speak, you’re going to raise a flag. If someone is dominating, have people give ideas silently on post-it notes. People can brainstorm on flip charts so the silent majority still has input. Also, be really clear about roles. A good technique is using a RACI to say who does what.