If you are in college or high school, please take classes in public speaking and effective communication. For the rest of us, books are written and classes are taught on how we can become successful communicators, and one key tip is to read a few of the books, and if you think you need help, take a class. What you learn will offer you a lifetime of improved advocacy skills that will prove to be well worth the time you’ve invested. As noted above, Toastmasters is one good starting point, but community colleges and others also offer courses that are worth taking. And again, you end up with a captive audience for your advocacy!