Before writing a conclusion, you must completely finish with the introduction and the main part of the work. Read what you get. If the subject in the main part isn't covered enough, even with this moment.
Proceed to the conclusion. Read the work again. Write down your main points on a separate draft. If the essay is written on the draft, the main points, you can specify fields on the pencil next to the appropriate paragraph.
Now work with your recorded thoughts. Read them. Can they simply restate using other words and adhering to a logical sequence.
It is possible that on the basis of the selected basic thoughts works, you can build more generalized conclusions. This option is harder but more creative and interesting, as well as the most advantageous from the point of view of evaluating the works.
Remember that the task of conclusion is to summarize your thoughts and to focus on what's important, and summarize the reasoning.
In conclusion, should reflect the author's attitude to the discussed topic or the problem. However, the composition must not contain too enthusiastic words or harshly negative assessment of the negative sides. Try to clearly and concisely justify their position.
Stacked in the stated amount of the conclusion, but do it organically. I.e. remember that the conclusion should be substantial, no excess water, essential connection with the main part and the logical sequence of presentation.