When preparing a speech, the first step is to find out as much information as you can about the audience so you can tailor your speech to suit them. Then plan a structure for your speech so you have a logical theme running through it.
Think of the structure from your audience’s point of view, rather than what makes sense to you. If you’re giving the same speech several times to different groups, you can make it more lively by using different examples and stories. Some speakers collect magazine and newspaper clippings or keep a journal of stories or ideas.