First, choose a topic. It must be relevant, original and sound smart. It's great if you don't have to choose a topic on your own, so as this is not the simplest thing at all.

Make an initial research to understand what is already said on this topic and which answers you should give in your essay to meet the expectations of readers. Use this expected answers as key points to prepare a structure of your essay. Don't start writing the main content until you have a structure.

Your work must look complete, so you need to cover all related subtopics and thoughts. At the same time, you should add some new points to your essay, show a new view on the problem. And try not to follow patterns and repeat other authors. As much as possible. However, it's possible to refer to known cases and quotes when it is on topic.

When you have a complete structure and short ideas (subtopics) what to write in each paragraph, start your essay. Just express your own thoughts on the topic. Follow the writing style that suits your situations, audience, and place of publication.

Double check everything in the end. Ask somebody for proofreading your essay if it's possible.