About 3 citations are expected in your initial response. The next thing to remember is not to re-hash the course material but to add something of your own to the posting. This may come from sharing your own experience and / or including examples that make your point. It is essential to establish a connection between the course material and your experience. Finally, one must pay attention to flow and presentation in the posting. Using headings or sub-headings can make your posting clearer. A typical answer should have about 500 words, but it is the quality of the answer that matters, not the number of words. You must keep in mind two things: (1) citations must be as per Harvard Referencing style and (2) at least 70% of the work should represent original writing.