One of the best editing advices I’ve ever heard was this…
Edit your story in reverse.
What does that mean? Start with the last chapter and go backwards. The early chapters have invariably been reread and edited far more than the later chapters, but, in a good novel, ever chapter has to be good. So, give those later chapters a fresh look by starting with them.
I tried this recently on the latest round of edits on our Gabby Wells: Water & Blood novel and it was a tremendous help. I was amazed at how many tweaks needed to be made by using this very simple technique.
Granted, reading the story that way made me feel like the main character in Memento, but it is a great approach.
BTW – I searched and searched and could not find the book or website where I read that advice. I wanted to give that person credit. So, whoever you are, thanks!