1. Build your confidence.
One of the keys to effective public speaking is to become more confident. You have to believe that you are good in what you do; and, in order to achieve that, you need to be prepared by properly researching about the topic you are going to talk about. Aside from that, better confidence can also come from more practice.
2. Look at yourself on the mirror.
If you want to improve your public speaking skills, then you should practice in front of the mirror. By doing this, you would be able to see how you look like while doing your stuff. With that, you can see whether you need to improve your stance, the way you open your mouth, the expression of your eyes, and such.
3. Listen to yourself.
Practicing public speaking can go a long way, as far as giving your audience a pleasant experience in listening and watching you in front. However, you should also listen to your voice. Practicing your speech countless times can help. But, it would be better if you can record your voice, and listen to it, so that you can really hear how your voice sounds to your audience.