Further to epicyclic redrafting...

What's helped me is making sure I write a paragraph describing each scene. I use an excel sheet. Each scene is on a row. Columns are: time (season, in this case); POV; description of the scene; and various themes and backstories I'm trying to keep straight. I use autosort to check for continuity of themes and POV.

If I discover that something needs to be filled into a previous scene, I can go to my spreadsheet and make a note in red that I can pick up later, either at the end of the writing day or at some date in the future when I'm actually wrapping this thing up, depending on how in depth the change is. In depth stuff waits in case there's some turn that will render it moot.

Knowing the story of what happens in the scenes ahead of time makes them a lot more fun to write. Not to mention giving the story more definition. I love writing description and characters, but keeping the story line up front is tough for me (as anyone who was in my crit group probably guessed).

These paragraphs will come in handing when I'm writing a summary, too.

I'm not good at sticking religiously to a system, but this one is really helping.