I highly recommend Jeffrey Veen’s Seven Steps to Better Presentations
My personal favorites:
- #3 Don’t Apologize. 
 Apologizing for your own performance so directly and swiftly weakens.
-  #4 Start Strong and #5 End Strong.
 I was in a sales presentation recently where the main presenter apologized 5 times in as many minutes. From the audience’s perspective – it’s painful, frustrating, and transforms what could be an engaging conversation into an unfortunate waste of time.