Try to write down a list of five things that make writing good. Think about what makes you want to read an article or a book, what characteristics would an interesting, well-informed and readable essay have?
As you read through the list below, think about the list of things you wrote. Are any of the items on your list mentioned? I suggest this because I think you will find that you already have a fairly good idea of what effective writing is. I don't think the point of a unit like this is to tell you much that is devastatingly new. It is to bring into sharper focus what you ‘know’ already, and to help you apply these intuitions as you develop your own writing.
So, were any of these on your list?