Practice makes perfect, the more you practice, the less room there is for error.
Articulate your words - it’s important to be clear and concise when public speaking
Attend other presentations and make notes on what is effective.
Arrive at the venue early: whether it’s a boardroom or interview, this will give you a chance to adjust to your surroundings.
Speak to people before your presentations: This can help you seem more likeable before the presentation.
It could be beneficial to offer to be part of someone in your industries webinars, panels or podcasts.