We want our readers to become so immersed in our stories that they forget an adult is behind the words. We don't want them to ever break that suspension of disbelief and realize that a person other than the main character created this tale. And yet if we remove ourselves entirely from the book it has no soul. Voice is the simplest writing technique to learn, because it's already in you. But it's the hardest to achieve, because it involves trusting yourself.
All stories start with an idea.
We read something in the newspaper, we have a dream, we recall a vivid childhood experience. Then we start plotting out the story in our heads. And we begin to worry about the characters and the dialogue, when the climax of the plot will take place, how it will end. Forget about your audience. You might try brainstorming on paper, freewriting where you jot down anything and everything that comes to mind.