Fellow speaker,
To keep yourself on your speech topic:
- Have clear objectives for your speech - know why you are speaking and what you want your audience to get out of your speech
- Prepare constantly - work on the speech many times before standing up to give it in front of an audience
- Quickly handle off-topic questions asked during your speech - if someone asks a question that is not relevant to your speech, quickly answer it or move away from it, and focus in on someone else in the audience who has an on-topic question
Topicially,
Tim