motivation
You learn to write by writing. It’s a truism, but what makes it a truism is that it’s true. The only way to learn to write is to force yourself to produce a certain number of words on a regular basis.
William Zinsser • On Writing Well, 30th Anniversary Edition: An Informal Guide to Writing Nonfiction
what determines your ability to write well more than anything else is writing a lot. Once you reach the threshold of writing a decent sentence, the thing that leads to success is writing more.