Focus on ensuring you have strong evidence to back up your argument (claim and reason(s) you are presenting and/or defending.
Know thy enemy!!! Anticipate what your opposing team will say and have prepared counterclaim statements, and evidence/analysis you can use against them in your debate.
Prepare a speech for up to 2 minutes (not the entire 3 minutes)--this gives you some cushion so that your speech doesn't go over, and allows you to be able to pause for emphasis (...dramatic pause...), allows time to make more eye contact, reference an image on a slide, and/or add to your speech last minute if a new idea or strategic statement occurs to you.
Mrs. Stewart's Course
You'll find a daily agenda posted here for each day that class meets