Even if your best friend owns a top publishing company, giving you an immediate "in," this does not guarantee publishing success.
First, you have to write a quality book that has a clear target audience. And your book must answer a common problem or need that audience shares. Then you have to develop a marketing plan, and stick to it for at least two years.
Let's begin with the process that should commence before you write your first word. Begin by reading A LOT. Read both books you passionately love and books you can't seem to make it past page five. Then figure out what the author did in the book you loved, and what was wrong with in the book you couldn't finish. Write down these points so they are crystal clear to you. Read other people's books for inspiration and to discover what you should avoid as a writer. More