0:55 - Practice #1: Continue speaking until the end of your sentence.
1:55 - Practice #2: Treat each member of a group as an individual.
2:51 - Practice #3: Emphasize similarities with other members.
10:01 - Practice #4: Learn to detach your ego from personal attacks

How to compose a successful critical commentary:

You should attempt to re-express your target’s position so clearly, vividly, and fairly that your target says, “Thanks, I wish I’d thought of putting it that way.
You should list any points of agreement (especially if they are not matters of general or widespread agreement).
You should mention anything you have learned from your target.
Only then are you permitted to say so much as a word of rebuttal or criticism.

Lucinda Beaman

The Influential Mind

Positional bargaining verus interest-based bargaining.