If you start to feel nervous while giving a speech or presentation, there are a few things you can do to try and calm yourself down. First, take slow, deep breaths and focus on relaxing your body. This will help to physically calm yourself down and ease some of the tension that may be building up. Additionally, it can be helpful to picture your audience members as friends or family members instead of strangers – this can help make them seem less intimidating and make it easier for you to speak confidently. Finally, if all else fails, just take a break for a moment – step away from the podium or microphone and take a few seconds to collect yourself before continuing on with your speech or presentation.