Ok, tonight practice the speech a lot, alone and in front of a supportive friend or family member. Tomorrow, don't have too much caffeine -- it'll make you jittery. While you're waiting to go up there, do this relaxation technique: tighten up each muscle group in your body, one by one, then relax them. It'll help get rid of physical tension. Before you start your speech, make eye contact with a few members of the audience and smile at them, maybe even exchange a few friendly words -- that way you'll feel you have allies out there. During the speech, smile, speak more slowly than you think you should, and if you make a mistake, laugh it off and keep going. Everyone in the audience has had to do the same thing at least once in their lives, and everyone knows how tough it can be. Courage -- you'll do great!