Agreed with what Ferre has said, but I'd like to add a little more. Along with talent it also depends on your effort you make to learn about it. Effective writing whether it's an article, newsletter or a sales copy is the product of good content knowledge and effective writing style with the ability to grab readers' attention. And all these traits cannot be developed within a day or two, instead it's a continuous process and needs assessment everytime you write something new.
You yourself are the most authentic institution that develops an excellent copywriter. Do it yourself! In order to start learning about copywriting start reading more and more about it, discuss the points with copywriters on web forums, practice writing copy, get your copy criticized (it'll tell you the flaws in your writing), and of course keep on learning about the new trends, behaviors, interests etc.
Last edited by Qurratulain; 07-09-2007 at 03:58 AM.