You should always be aware of the conditions under which you are supposed to deliver your speech (the occasion, the topic, type of audience, what is expected from you, the environment, your own credibility as a speaker, the time you have, etc.).
It could be a good idea to watch and listen to other people’s speeches and flow them, so you can learn from them.
Learn lessons from great speakers (for example, Martin Luther King, Winston Churchill, John Kennedy, Lou Gehrig, etc.) and try to analyze what made their speeches great.
You’ve agreed to give a speech either at work, at a social occasion or at your club meeting. As a professional writer, I often have people come to me for help with writing.
Despite their great ideas and depth of knowledge, they feel unable to start.