Easiest way to get a laugh from an audience. Just tell a story about something really embarrassing that happened to you might be embarrassing to you, but it's funny to other people. I'm not saying human beings are all cruel. But if you see a cartoon character slipping on a banana, you know, nobody's really getting hurt. And it's not you it can still be funny. So if you're looking for source material, just look at the most embarrassing things that have happened in your own life.
Make sure that it ties into a principle a message that's relevant to your audience.