3. Introductory Paragraph Start broad and get specific at the end. Your first sentence should be an attention getter. For a research paper or persuasive essay, you might consider using a quote or startling statistic. You can also use this paragraph to introduce some of the points you will be making in the essay or paper. Your last sentence should be the main idea of your essay, or thesis statement for a research paper. Picture an inverted triangle to help you.