How do you passionately articulate what you know and believe while remaining calm, professional, and pleasant?

This can be a huge challenge for me.

Today Bernie, Rastin, and I had a 90-minute conversation about an aspect of our websites. Bernie and I felt one thing, Rastin probably agreed, but we differed on how to address it.

A couple times throughout the conversation I stated my position fairly forcefully - too forcefully. Not blowing up, or anything like that, but not exactly cool like a cucumber, either. I later apologized to Rastin, but it’s still bugging me.

I would like to train myself to disengage my ego, disengage my competitive drive, disengage my emotions, and discuss pressing issues calmly and professionally.