As a new author myself, I'm more in the taking advice mode. That being said, I can tell aspiring writers this much. The most difficult thing I ever did was write a book. If you want to be an author, your manuscript has to be something you are literally desperate to share with others... Something that you believe will have a positive impact on others' lives. It is just too easy to shelf a project along the rocky road to publication if the material is not close to your heart.