The topic of a persuasive essay can be anything provided that you have valid points to justify your arguments. Whether you are giving examples of persuasive essays such as junk food in schools or asking for a salary hike from your boss, the format and articulation have to be appropriate enough for the essay to make a mark. Here are certain tips that will teach you how to start a thesis. The first thing that you should keep in mind is the requirement for a strong stance which you can defend in your thesis statement. The thesis statement is basically one sentence which tends to boil down the argument which you would like to discuss in the essay. Unless you have a strong beginning, there is no way you can make an impact on the readers.