Step 1. Thanks for having me.
Step 2. Express shock that someone with your life story could ever stand before such a crowd…
Step 3. ...But that's just America for you.
Step 4. Pause for audience interruption.
Step 5. Have gracious comeback ready.
Step 6. Pay homage to Founding Fathers and/or quote The Declaration of Independence.
Etc, Etc. And they fill it in with a lot of examples from Obama's greatest hits. Check it out.