Rewrite the thesis statement to present it in a different light, using dissimilar words and phrasing to reinforce your ideas as valid and acceptable. Use a thesaurus to help with rewording. This reminds the reader of the most significant focus of your essay.
Edit out worn phrases and abstractions like: "in conclusion," "my conclusion states," "my conclusion proves," "so/thus you can see," "in essence."
Reiterate the main points of your essay by summarizing those ideas briefly in a memorable manner.
Return to your introduction to re-examine your method of drawing in the reader. Find a way to link to your introduction at the start of your conclusion. If you begin your essay mentioning a particular topic, word, phrase, or famous person -- even a quote -- start your conclusion by mentioning the same subject or person.
Pose a question or suggest a call to action as an alternative way to start a conclusion for an essay. This challenges the reader to think about the essay's content.
Tie up lose ends at the start of your conclusion to help pull the whole essay together as one cohesive piece.