You should own a copy. Your paper should make a single point or a handful of related points and should follow a simple organization. Avoid cluttering it with extra points. If you developed an argument that later became ancillary as you rethought your paper, drop the argument from the paper. Break your paper into numbered sections and subsections.
More sections is better than fewer.
Sections help readers see the structure of your argument. Start each section with several sentences summarizing the argument presented in the section. You may cut these sentences from your final draft if they seem redundant with your summary introduction, but you should include them in your first drafts to see how they look. Writing such summaries is also a good way to force yourself to decide what you are and are not doing in each section, and to force yourself to confront contradictions or shortcomings in your argument. Often these section summaries are best written after you write the section, but don't forget to add them at some point.