A manual for writers of research papers, theses, and dissertations, Ninth edition - Kate L. Turabian 2018

Give it up and turn it in
Revising sentences
Research and writing

If one thing is harder than starting to write, it’s stopping. We all want another day to get the organization right, another hour to tweak the opening paragraph, another minute to . . . (you get the idea). Experienced researchers know that nothing they write will ever be perfect and that the benefit of getting the last 1 percent or even 5 percent exactly right is rarely worth the cost. Less experienced researchers should take this lesson to heart. Dissertation students in particular agonize over reaching a standard of perfection that exists largely in their own minds. No thesis or dissertation has to be utterly perfect; what it has to be is done. At some point, enough is enough.

Page through it one last time to be sure that it looks the way you want it to: look at page breaks, spacing in margins, positions of tables and figures, and so on. Then give it up and turn it in.