> As the listener, before responding, it's a good habit to say "This is what I understand about your proposal" and proceed to summarize and give the original speaker an opportunity to correct you.

I find a practice like this is also helpful for following up after a meeting. For meetings that warrant my taking notes, I like to type them up immediately afterwards, send them out to the other attendees, and solicit corrections or confirmations while the meeting is still fresh on everyone's mind.

It was a bit scary when I first started doing that since I'd fear that I might have misunderstood something and would be revealing my ignorance. But to the contrary, I've found that it tends to encourage others to share their notes for comparison and elicit further discussion. (If there's something I've misunderstood from a meeting, usually someone else was confused too.)