Know 300% about that topic you are presenting
Stand and Deliver by Dale Carnegie Training85 states that you should know 300% more than what you are presenting. This will position you well for managing objections, having informed opinions, and exuding confidence.
Know your audience
Some people love a good story and that is what resonates with them. Others are more binary and expect data driven content.
Find pre-meeting alignment
If possible, identify key executives that you may be able to find alignment with ahead of meeting with the broader team. If these key executives are nodding along and agreeing with your idea many others will follow suite.
If you don't know the answer, that's okay! Just admit it. Executives are excellent BS detectors. If you are waffling, lying, or simply afraid to admit you do not know the answer you will lose credibility quickly!
Be clear and concise
Do not ramble. Avoid using "uh" or other filler words regularly. Perhaps most importantly, don't answer questions that were not asked.