How do you manage emotions and tempers in mediation?

In mediation, there are often moments when we become coaches through difficult, emotional moments.  At those times, I find it is helpful to take a lesson from addiction counselors.  They call it "SOBER" breathing and it works like this:  Stop, Observe, Breathe, Evaluate and then Respond.
What techniques have you used or observed to be effective when emotions erupt and tempers flare?