Make sure you have an incisive argument
Affirmative
You have he burden of PROOF
Negative
You have the burden of CLASH
You need to address the arguments
Be tactical. Stand back and pick the BEST argument to go in for the kill.
Don't let your opponent dominate the question period. This is how you take back control:
Thank you very much. My next question is......
Thank you. Can we move on....
If you give me a chance to answer.....
My opponent said this, however ......