I wish I was one of those authors who could sit down to write and manage 5000 words, all at once. Me, I do 600 here, 400 there, and by then end of the day - if I'm lucky - I'll have 2000 words. I need more.
I've taken courses in how to write super fast. Read books. But the one time I tried that, I ended up with a disorganized mess and had to delete half of it, and fix the rest, which meant I'd have been better off just following my usual method.
So I plug away, hoping the scene shows itself, praying the characters reveal what they really want.
And one by one, the chapters get done.