1. Seek common ground. Is there anything I can agree upon? Seek to understand then to be understood;
2. Is this the right communication channel to express different opinions (right timing? right place? right person?)?
3. Can I express my thoughts from an objective angle and with a loving heart? Clearly separate opinions from facts.
Important tips to keep in mind:
Quick to listen (not just hear), slow to speak;
Check my ego at the door before engaging in any conversation;
Control emotions instead of being controlled;
Use emotional expression to add value instead of destroying value (to be constructive instead of destructive).
If unsure what to say, then just listen and keep quiet (use eye contact or take notes, show respect).