For editing, one thing that has helped me is learning sales copywriting and direct response.
Copywriting forces you to trim the cruft and makes you take the reader's perspective. Their time is valuable so you need to be entertaining and engaging, AND you need to get to the point fast.
Tested Advertising Methods & Scientific Advertising are just some of the classic books about sales copy.
I don't know what topic you're writing about, but sometimes you really just need to get your work out there, despite it not being perfect.
I spent too much time writing and re-writing this article on procrastination (https://medium.freecodecamp.org/procrastination-sucks-so-her...) till I finally said "f--- it, I'm going to write this last section about finishing and shipping, then hit the publish button"