Guides for voice usually focus on diction and syntax as the main avenues to achieving voice, and it’s certainly true that messing with diction and syntax will get you some unique voice. But the true source of strong voice comes from a different source.
Once the author becomes visible, the enchantment of the story dissolves. The author is the creator of a story, but the author should never be a part of the story. The author is the man behind the curtain. Reveal the man behind the curtain and the Wizard of Oz narrative dies. What sorts of things reveal the author? Here are 12.