I know I'm at the end of revision when I reach two steps. First is the printing of the entire book (2 pages per sheet, double-sided). It helps me to "see" the book better compared to reading it on the screen. Errors, silly mistakes, and page count becomes easier to notice when I can actually hold the pages. Although my handwriting can get a little messy, some of the best changes come from me scribbling something in the margins. There's a certain finality to printing out. Since it many papers, I want sure the book is good shape as possibly. It's a massive waste to print things out, if a third of book is crossed out right away. So printing in some ways in more psychological as I know I'm near the end.
A second step in my end of revision process, and the very last thing I do, is listen to it. In the version of MS Word I use, there's a speech to text function. The voice is rather robotic and jarring at first listen, but it's a good way to catch missing words that my brain automatically back fills as I read. Listening also keys me in to any friction in the text. Anything that sounds off, is an immediate pause for me to check. With my new laptop letting have Bluetooth connection, I can cook, clean, do other chores while listening.