There are many tricks and tips for overcoming stage freight. First of all, you should focus your attention on thoughts and images that are calming and reassuring. Second, there are several classic or traditional examples of advice for overcoming stage freight that may be outdated now, and you should keep this in mind when speaking in public. One example we have all heard is to try to picture the audience in their underwear.
The thought behind this is that because you may have a fear that the audience can see you are nervous or they are judging you, then it is best to have the upper hand. Another piece of advice is to pick someone you know and trust in the audience and keep your focus on them. All you have to do is to pretend you are performing for just the one person. This particular bit of advice is better because having that contact to rely on when you are feeling like you are losing your grip or control.