Public Speaking Tips
With rare exception, you only need to memorize the introduction, personal story, jokes and transitional parts of your speech, not the whole thing.
Like most activities, if you visualize yourself doing something beforehand it can help boost your confidence when you're actually doing it.
Try to get to know the room you'll be speaking in beforehand. For example test the microphone and other equipment if possible.
Avoid making any awkward situations worse by apologizing or saying, "woops that was awkward, excuse me." Just keep going and forget about it.
A bit of walking around and hand gesturing while speaking helps keep the audience engaged in your presentation.
Make sure you dress nicely for a boost in confidence. Also dress appropriately based on the topic and type of audience you'll be having.
If you have a relevant personal story or good joke to tell and your audience is appropriate it would be good to use it.
Use strong body language if you're at a meeting and sitting at a conference table.
Sometimes it helps to videotape yourself beforehand if you're unsure of how you'll come across in your presentation.
If you're speaking informatively about something, try to act like a world class teacher when on the stage.