A few people have suggested that you should write 1000 words a day.
I think this is a bad idea for the same reason that a developer should not aim for 1000 lines of code a day.
It means nothing. It may actually encourage bad habits. A developer may never recognize opportunities to refactor code and/or use more functional languages. A writer may never understand the value of brevity.
Writing is a game. I read and re-read with the goal of communicating using the fewest words possible. If I can save you time and get a message through then I’m all for it.