Over the course of time, I've had people ask me how they can make a living with their writing. I know several self-published and traditionally published authors who successfully make writing their career. When I have asked them for the keys to success, they often say, "diligence". They also say "time". This would be both time spent writing and periods of time building a "platform".
Novelist Nora Roberts has one cardinal rule for writers who want to make a living. Here is my paraphrase of it: Seat your daire aire in the chair.
As one growing into the professional writer role with much yet to learn, I am not without opinion on the topic.
As for me, I think you have to be humble enough to try every kind of writing--even the genres that don't appeal to you initially. I never thought magazine writing would interest me until I gave it a shot. Now I love it. I have other goals and dreams as a writer and I know that in the "write" time, I will make a living with my art. Because I'm not an expert and there are many who are, I will defer to someone else for more proven advice.
Here are a few tips from Laura Turner.