I believe in practice. To develop in any art or skill, you must develop a practice.
The way a pianist practices scales or a difficult piece by Chopin; the way an artist sits in The Metropolitan Museum of Art to sketch a sculpture by Carpeaux; the way a dancer goes to class thousands of times in her life to practice the same plies and relevees. A writer needs to practice, in both old ways and new: to plow the same old fields (“I’m writing about my family again?!”) and also find other roads that lead to discovery and surprise.
The way you practice has everything to do with how you are able to compose. After years of schooling you learn to pursue your talent and your craft for pleasure and for practice.