Final answer:
Plan the thesis statement paragraph first when completing the plan sheet for an Argumentative Essay.
Step-by-step explanation:
When completing the plan sheet for an Argumentative Essay, it would benefit you to plan the thesis statement paragraph first. The thesis statement is the central argument of your essay and sets the tone for the entire piece. By planning and crafting a strong thesis statement first, you can ensure that your subsequent paragraphs align with your main argument and effectively support it.