It is impossible to write a good composition if you don’t have a clear plan to begin with. You have to organize all the information, to divide it in chapters and make sure that you do not miss anything crucial. An outline will help you do this if you are not very good with planning; make sure that your content is clear for any reader. To make things every easier for you, you can decide in advance what chapter you will write this week. Write all this on a calendar so you don’t forget something important.