The introduction should contain some commentary on the essay topic. Perhaps a definition of key concepts or an explanation. Think about the way you understand the question. Also in this section you have to list which aspects of the topic you will view and why. Remember that your essay is not a novel, so you only need to choose a few basic arguments that are relevant to the topic. The introduction should give us a clear idea of what will be discussed further. And your reader should see that you are viewing a specific set of questions posed. Well, there's a simple way. I always browse around Essay Ray for more ideas. It's an online writing service that I tried lately.