Write it, memories it, practice it. Best advice for anyone!

OK. I cannot teach you now what you can do in a speech. There are several things which can be done. If you have a given topic, the first thing is to think, who will be the auditory. The people who you talk to. This will have consequences on your whole speech building. If you do not have a topic which to talk about, I would say, this is the first thing you have to do. I hope others can give you also some advise, since there are many possible first steps in doing a speech.