A lot has to go right to end up with something that is well written. You need to have a clear understanding of what it is you want the text to achieve - if you want a text to do something for you, you must give it a purpose. Also, you have to be mindful of whom your text addresses and the genre or the type of document that you are aiming to create. For every specific writing situation, a balance must be struck that involves weighing against each other, a multitude of concerns.