Get a Minor
If you are a writing student, stop now and contact your advisor. Get yourself into business and marketing courses. You will be your own business with yourself as your product.
If you are a writing teacher, make sure all of your idealistic artists understand how to sell their work, not just make it. If I ever open the Eighty Six the Poet Institute of Creative Writing, students will be required to minor in business.
Enough about how I can't do it. How have others done it?
Some people write an ebook simply based on what can sell. This is okay, particularly if you are an expert at a topic and want to share your knowledge. Find a niche, build an audience and deliver the book they want. Write the “Ultimate Guide to How-To Books" or “How To Write an Ultimate Guide."
But I am focusing on poets, fiction writers and storytellers that write great stuff and deserve to make a living at it. So how do you do that?
First, understand what you are good at. You write words. You are not a salesperson, an editor or a cover artist, although you need all these things.
Second, realize you are selling a product. No company does that without a plan, a budget and a team. You need those things, too.
If a brilliant engineer built a wonderful car then put it on the street with a For Sale sign, it would stay there.