There are two basic approaches to creating the content of a speech: (1) write out every word, (2) put down clear notes and amplify them during the speech. Both methods have their pros and cons. You may benefit from using a bit of both, then adjusting based on your personal style and experience.
In the first [...]

One of the best ways to liven up even an already very good public speech is to add audio-visual aids. A short clip from another speech or a brief video (with or without sound) can often convey the message in essential form.
Sound and images can be used in many, many ways.
A short video can be [...]