Writing a speech about archery is no different than writing any speech. Once you have decided that archery is your topic of choice, you can simply continue with the rest of the speech-writing process as you would with any topic. You must decide whether you are trying to inform people about archery, or persuade them about something related to archery. You then must outline your speech, deciding how to include some qualities of effective speeches in the beginning, ending and body of your speech.
Decide what type of speech you are going to write. There are many types of speeches, but in general, speeches are either informational or persuasive. Informational speeches might be about objects ("Types of Arrows Used in Archery"), processes ("How Recurve Bows Are Made"), events ("Archery in the 2008 Olympics") or concepts ("Why Compound Bows Shoot Farther Than Recurve"). Persuasive speeches, on the other hand, try to convince the audience of something, tending to pose questions of fact ("Which Olympic Archers Will Return?"), value ("Are Fiberglass Arrows Better Than Carbon Fiber?"), or policy ("Should More Points Be Awarded for Split Arrows?").
Write an outline just for yourself; you don't have to show it to anyone or bring it with you to make the speech. State the specific purpose of your speech ("To inform/persuade my audience that...") and the central idea, which is more specific, like the thesis of an essay ("Fiberglass arrows are not better than carbon fiber arrows because..."). Then, label spaces for an introduction, body and conclusion.
Come up with two to five main points for your body first because you need to know what points you will be making in order to properly introduce them. You may have to do some research if you haven't already, because you need to know all of the details for an informational speech or supporting points to defend your side of a persuasive speech. Jot ideas down in your outline along with examples, proof and possible media you can use to back up each point. Make sure each point supports your central idea and meets your purpose. Once you are satisfied that you have two to five strong points, make sure they are ordered in a way that makes sense, and then start turning those notes into sentences, dedicating a rough paragraph to each point.
Write an introduction and conclusion that will help the audience warm up and cool down to your archery speech. In the introduction, get their attention by relating archery to their lives, surprising them with facts about it, making them curious about it somehow, or telling a short story that they will enjoy. In the conclusion, summarize your ideas, and then close with an archery-related quotation, a dramatic statement or a reference to the introduction.