Who is the audience?		Find out everything you can about the location and logistics of the venue
What is the purpose of the event?		What are their expectations of you?
Why were you asked to speak?		What are their backgrounds? How much background information about your topic can you assume they bring to the presentation?
Where is it?		Is it to inspire? Are they looking for concrete practical information? Do they want more concepts and theory rather than advice?
When is it?		Do you have enough time to prepare? What time of the day? If there are other presenters, what is the order (always volunteer to go first or last, by the way). What day of the week? All of this matters.