Tip 2
Once you have the topic of your choice, begin researching on the same. A good expository essay is the one, which has lots of facts, figures and researches to back it up. So, search on the Internet, read newspapers, books and magazines, take interviews, and collect as much data and information as you can. Any researches in the said field, statistical findings, historical facts use anything which brings forth the topic at hand in the most legible way.