So, the first thing that you wanna get down tight is a story. If your a one man, or woman, group making oyur own manga, you want to thouroghly think this out before actually drawing it out, orelse it'll be a waste of time. OR if you want to make it easier on yourself, hire a writer. Our whole purpose is to make stories and make an artist's life easier. If you plan on being a writer, then you need to be original with your work. Speaking of that, it also applies to drawers, nobody wants to read your bootleg versison of some random manga.