From google i see this...

An effective briefing should..

• Hold the policymaker’s attention
• Build understanding of the situation and the options
• Gain acceptance of your recommendation
• Stimulate action

• Understand your policymaker
• Clarify your objective
• Know your material thoroughly
• Define your main messages (1–3 maximum) and supporting points: write our a short outline and notes
• Create an appropriate introduction and conclusion

• Do not read your memorandum: The policymaker should have already read it
• State your main message early
• Reinforce your message
• Restate your main message in your conclusion
• Practice

• Aim for credibility and persuasiveness
• Speak naturally and make eye contact
• Do not read your notes
• Avoid technical jargon
• Be succinct: know when to stop talking

• Anticipate likely questions
• Ask policymaker to clarify the question
• Disarm loaded questions: Don’t be defensive
• Align your answer with your main message
• Get back later if you can’t answer question on the spot