Greet people as they walk into the room. Simply stand at the door and introduce yourself as the speaker. For bonus points, ask people if they have any questions in advance. That will ensure you are aware of the audience's expectations and what they hope to get out of your speech. Boom. You're no longer speaking to a room full of strangers. You're speaking to new friends.The post from Dumb Little Man has some other neat tips on how to be an effective speaker, including a professional speechwriter secret: printing out your speeches in size 18 font or larger so it's easily readable from a distance.