occasion :

• The four most common delivery styles for public speaking include speaking from memory, speaking impromptu, speaking from a manuscript, and extemporaneous speaking. Before writing became a common practice, orators would memorize their speeches

topic :

• Introduce yourself
• Make a great opening statement.
• Structure your speech.
• Begin every paragraph with a topic sentence.
• Use very good English
• Express your opinion
• Write from the 1st person and engage your audience.
• Use personal details and anecdotes.