For each edit pass, edit for only one thing. For instance, do a pass to identify and get rid of adverbs. Then do a pass for readability. Next, a pass for overlong sentences. And so on.
If you see other errors, ignore them until it's "their turn." Address them only during a pass dedicated to that topic.
Why do it this way? Because if you edit for everything you see, you'll get a few hundred words in, then you'll start over to see how the revisions read, and you'll do that over and over. Thus you'll end up with what everybody ends up with, a document edited to death up front with insufficient attention to the rest.
Also: when you complete a focused pass, you get the satisfaction of completing a task. That helps you find the motivation to do more.