I've found six things to be helpful to me in continuing my fiction writing:
(2) Reading quality books about both writing technique and revision.
(3) Joining a workshop or finding other writers willing to read your work and give you kind, but honest feedback, so you know what is working, what may need more work, and whether what you thought you were describing is coming across to the reader.
(4) Re-reading scenes or chapters of pieces you’re working on, over and over, and revising, expanding, and contracting, at will, until you feel you've got it right.
(5) Listening to feedback, but only using what is helpful to achieve your own vision.
(6) Reading a variety of authors to expose yourself to all the possibilities in story structure, characterization, description, dialogue, and point-of-view.
Workshops are optional, but often, what they achieve, if you’ve found the right group, is to learn that you are on track and your work is appreciated. Much of the critique addresses technical matters, and every writer works to improve their craft. Even iconic writers like Joyce Carol Oates talk about asking readers to review their work prior to publication.
I wrote a post called Recommended Books on the Craft of Writing a while back, where I list and discuss sources I've found helpful in my journey to become a better writer. For Fantasy, SciFi or Speculative writers, I also wrote Writing Fantasy Fiction: A Short Bibliography.