Today, I need to have similar results. I feel really uncertain about yesterday's writing so I'm very unsure I should be building on it.
Perhaps that's the task at hand: re-read and see how bad it is.
Update: pretty damn bad.
Okay, moving on. I think it will be fixable in revision. Must get to the end of this story.
Back to the original requirements: It's okay if this story is complete crap. Just write, fast, like the wind. Get to the end. I can add detail and personality later.
It's all good. Write fast. Many words.
***
Hmm, things are not going well. I am stuck in that terrible place: it's all horrible. I am the worst writer ever. How can I be so bad at this.
It's because all these books are crap. I need to be writing something I actually like. I hate these types of stories. But if it sells, how can I resist it. Must write more, that's what.
And they sell. These types of stories sell. So why am I being stupid about this?
Really, stop taking any of this seriously. Right now.
***
Edit: so really, it's just that I am such a perfectionist. No book is perfect, so as long as you are delivering what the readers want, they have learned to see past the imperfections to get what they need.
The less not-perfect you have, the easier it is on them. But the reader can deal with more imperfections than we might think.
So no reason to get so worried.