Practice. Run through it until it's smooth. Great demos that look like they're off the cuff are actually the result of hours of rehearsal. Your passion will

Practice. Run through it until it's smooth. Great demos that look like they're off the cuff are actually the result of hours of rehearsal. Your passion will shine through, but only once you're so comfortable running through the demo that it has a chance. Also, make sure you get a good sleep. There's nothing worse than wanting to be calm on stage while being jumpy from lack of sleep.