Check out my latest post on the Constant Contact Community Blog, Presenting When You're an Expert, which provides 7 techniques to use when you have to present on a topic that you know a lot about:
https://community.constantcontact.com/t5/Member-Blog-Marketing/Presenting-When-You-re-An-Expert/ba-p/275649
https://community.constantcontact.com/t5/Member-Blog-Marketing/Presenting-When-You-re-An-Expert/ba-p/275649