Write. Do the work.
This is a part of the practice of becoming a writer. It is about making the mistakes and writing ugly stuff. It is about learning what you like and what you hate. It is about not letting yourself pretend that you are working just because you are researching or thinking about the story or waiting for inspiration.
It is about learning about how you work and that learn to run on empty is sometimes the process and then, at the end of it, for the rest of the day, fill the well.