Know your audience and match your message to the audience.
Respect your audience and suspend judgments.
Know exactly what you want to achieve.
Think and organize before you proceed.
Think about your audience's point of view.
Be mindful of what you face and body are conveying nonverbally.
Listen carefully to all responses.
Be willing to share what you know and hear what you don't know.
Stay focused on what you want to achieve and don't get distracted.
Find a way to get your audience to explain what they think you said. Discuss differences until you hear a satisfactory version of the message you wanted to convey.