Best Advice Is free
I've never taken Holly's course, but I'll freely give you the best revision advice I ever received.
DO NOT revise as you go, or you'll never finish.
By this I mean, don't just wade in and start at page one looking for things that are "wrong" and start "fixing" them. Instead take a clean pad of paper and a pen and set them next to your manuscript.
Start reading, and don't read any of your manuscript without that particular notepad next to you. When something comes up that looks, sounds, or feels "off", write it down. And, at all costs, resist the urge to fix any part of it then.
Mark typos in the manuscript, but don't input those changes until later either. The notepad is for character, structure, story, dialogue, and continuity issues.
Use only one notepad for this, so that your notes are all in one place, and in the order that they arise in your manuscript. write down page numbers as you make notes.
When you've gone ALL the way through the manuscript, making notes ( and not changes), take some time off (a day or two) to clear your head and then pick up the pad, NOT THE MANUSCRIPT. Read it through and create a new document for your rewrite plan.
In your rewrite plan you will incorporate all/some of your notes from the pad of paper and come up with a unified, organized plan of action.
You see, if you start correcting as you go, you may think that a line of dialogue on page 3 is stupid, cut it out, and then realize that it was a crucial setup for a major event on page 158, etc. So now you have to go back and fix page three again (as well as anything else related to that change).
If you head down that road, you will never finish.
Happy revising. No one will tell you this, but it can be the best part of writing.
-Glenn