Public speaking has generally been viewed as more of a challenge for quiet people, but this talk presented at Google turns that around and presents reasons why the opposite is true. While this talk is somewhat long, it's also very good in keeping the viewer interested and hooked on what the speaker is saying.
This is a video by TED, well-known for their unique presentations and ideas, on how every speaker delivers their message to the audience in a memorable method. It reveals a lot of interesting insights in how to do so.
This is the founder of Real Men Real Style, Antonio Centeno, giving 10 insightful tips on speaking that are not so obvious. He shares tips on skills such as knowing your audience and how to effectively incorporate stories into your speech.