The document discusses selecting a subject and determining the purpose for a public speaking engagement. It provides six considerations for choosing a subject: 1) Is it suited to the overall purpose? 2) Is it interesting to the speaker? 3) Is the speaker qualified? 4) Will the audience find it interesting? 5) Will the audience find it useful? 6) Is it sufficiently narrow in scope? After selecting a subject, the speaker should then formulate a specific purpose and central idea to help effectively plan their speech.