1. Choose a topic: Before you begin writing your expository essay, you must choose a topic. It should be something that you are familiar with or have a strong interest in. This will help ensure that you are able to write an effective essay.

2. Research: Once you have chosen your topic, you should research it thoroughly. Make sure that you understand the topic and that you have enough information to write an effective essay.

3. Outline: Before you start writing, create an outline for your essay. This will help you stay organized and ensure that your essay flows smoothly.

4. Introduction: Begin your essay with an introduction that states the main idea of your essay. This should be followed by a few sentences of background information to provide context.

5. Body: The body of your essay should be made up of several paragraphs. Each paragraph should focus on one point and provide evidence to support it.

6. Conclusion: End your essay with a conclusion that summarizes the main points of your essay. This should be followed by a call to action or a suggestion for further research.

7. Proofread: Once you have finished writing your essay, proofread it carefully. Make sure that there are no spelling or grammar mistakes and that the essay flows logically.