Writing articles either for magazines, newspapers, journals or for online article directories is an art in itself, nevertheless. The only difference with the online articles as opposed to the others is that you are promoting a certain site or a certain business by providing links somewhere at the end. The trick here is not to sound promotional as it creates an impression that you are buying the reader’s time for the purpose of buying their business. Let the resource box do the promotion for you. It should be more like you make the reading experience worthwhile for the readers. You MUST respect your readers’ concern and direct their keyword search to articles that offer exactly what they are looking for.