As important as analyzing the audience is assessing (and then preparing for) the setting in which you will give your speech—size of audience; location; time; length of speech; and rhetorical situation:
Where will the speech take place?
How long am I expected to speak?
How many people will attend?
Will I need a microphone?
How will any equipment I plan to use in my speech, such as an LCD projector, function in the space?
Where will I stand or sit in relation to the audience?
Will I be able to interact with the listeners?
Who else will be speaking?
Are there special events or circumstances of concern to my audience that I should acknowledge (the rhetorical situation)?