While practice, practice, practice will help you speed up, the ultimate question is, does the audience share your same feedback? There are many questions that need to be understood to best help you, such as, What type of speech are you giving - ie. Is it purely research or factual based? Who is your audience? Is there a timeline for your speech? Is the material boring to you? Are you presenting from memory? And more... It would be best to understand your speech project before giving specific guidelines. Should you want to pursue a more in depth look into your presentation material and delivery I'm happy to help.