I'm order for a speech to be good , you have to speak from the heart. If you can't express the way you feel as you speak and make me feel and understand what your saying then it's not a good speech. Also you must get my attention from the start , start will a sentence that will make me wonder or make me think. First of all you need to have a logical reason for this speech , second credit anybody you use in your speech . Last but not least.  Show emotion, make your readers feel the emotion . That's the three most important things, do this you'll have a good speech.