Long story short, an Impromptu speech is a horror for many people. Many people cannot deliver an Impromptu speech in front of a large audience. As the topic is provided few moments before the speech, therefore, it becomes difficult to write and prepare an Impromptu speech. However, there are still some methods that can be used to improve the Impromptu speech. Make sure that you are mentally prepared before going to a gathering where you might face such a situation. When faced with an Impromptu speech, be confident, make your notes on a small piece of paper and use a suitable tone. This will help.