If you wish for some practical ways to increase your speechmaking look over here.
The fear of public speaking is a problem for many, but there are ways to combat this whilst on stage. Do not drink caffeinated drinks before you start it will enhance your anxiety. But do take water in case you get a dry mouth. Eat something upfront, a low sugar level won’t help to drive off any nervous thoughts and will also affect your attention levels. Remember that the audience is not there to see you. They are much more interested in what you have to point out, so don’t feel like you are getting judged, simply deliver what you have to say. If needed, use breathing and relaxation tactics before you begin to help settle any last minute jitters, many public speakers use breathing strategies. Henry DeVries recommends this for anyone who goes through with anxiety about talking in public.
Nothing is more displeasing in a talk than it feeling exceedingly rehearsed or boring; although presenting and public speaking should have a degree of organization it should be said that looking and sounding like a robot is no way to get your target audience involved and potentially interested as to what you are expressing. Although this might seem a little catchy you might want to work on your stage presence. This example of public speaking manners mostly consists of you learning how to demand your space within the stage. This can be anything from being aware of your body language to dominating the space on the stage. The proper physical communication can have a powerful impact on how your message is delivered and taken. This also has the added benefit of making you look less anxious on stage as well as helping increase the high quality of your performance. Simple ways of doing this are looking at your audience and not staring at your feet and keeping away from crossing your arms so you look restless or unapproachable. Small changes like this can have a massive difference. A great way to do this is to learn from example, look at clips of expert public speakers like Lady Barbara Judge speaking. Study the nonverbal communication and mannerisms, this will give you some inspiration to work off.
Nothing becomes muscle memory unless you practice non-stop. If you have a gigantic speech coming up, make time on a regular basis to practise. Prepare your goals and the content well ahead of time. This can be done while driving, exercising, in the car, on a jet just about anywhere. Having memorised the speech, you can direct your attention on to your stage presence or projecting your voice adequately for the amount people in attendance and the scale of the site. Nearly all famous public speakers advise that you should memorise a large proportion, or nearly all of your talk before preforming it. Tim Ferris frequently suggests getting acquainted with your script before preforming it.