I can't really offer anything more than a personal anecdotes, but here is what I usually do for when I try to grab attention of a group of my peers:
But those are all just little little tricks, when the surest way of attracting attention of the audience is simply to have something important and interesting to say.
I probably sound like a self absorbed jerk writing this, but if I want the attention to focus on myself, and not my interlocutor I often use "me" language.
While we are at that topic many people use "you" when talking about themselves. They say sentence like: "Yesterday I thought: You should go to gym."
I once even listened to someone who used "he" to when speaking about himself a few years ago. The language was German and he was an Austrian, but it still signified how little he identified with his self in the pas...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.