Reigning in the obsessive reviser, also called moving on.
As authors, we are our own worst critics, and there will always be those features (in our writing and in ourselves) we’d like to strengthen. A piece of writing (or art of any kind) never feels completely finished in the eyes of its perfectionist creator. And let’s be real—authors, for the most part, are just like that by nature. I know I am. You may realize after adding more material, completing some revisions, or going through a total overhaul of ideas that what worked during an earlier iteration of your project no longer achieves the desired goal in the newest. So, if a story-line, character, sentence, or word isn’t doing the work you need it to do, change it. Just remember that, when revising, the goal isn’t to get it perfect or even good enough, but to make it good for now. Revision is a recursive process. You will do it again. And again.
If your text isn’t perfect after that one mid-write edit, oh well. Keep going. If your text isn’t perfect after that midnight revise, oh well. Come back to it tomorrow. If your text isn’t perfect after your 5-minutes-until-due-date scramble, oh well. Turn it in anyway. You must resist the urge to edit so fiercely along the way that you cease to write anything new and, instead, produce one-hundred versions of the same paragraph, page, chapter, without progressing or meeting deadlines.
I’ll say it again: Revision is repetitive, but it is not meant to achieve perfection—especially if that obsessive quest for perfection results in late or no submissions. That’s not perfect at all. The point is, you WILL have the chance to make more changes (even if you are working on a deadline). What I mean by this is that, if on a deadline, you get the text to a “good for now” status—the best work you can do in the time given—and you pry your pen out of your hand or off of the keyboard in order to submit it. If the compulsion to continue revising remains, go ahead and work more on your copy of the text knowing that the submitted work was good for now, as complete or concise or creative or accurate as it could be with the time and resources allowed, and just move on.