In order to write down an essay, first make an out line of the points u remember about the topic e.g., if u r writting an essay on Kashmir dispute then it might be outlined like this

1) Kashmir history
2) Indian occupation
3) role of Mujahidin
4) Pakistani stance on Kashmir
5) Indian Stance
7) UN resolution on Kashmir
8) brutality of Indian army
9) Role of Kashmiri political leaders
10) role of Pakistani political leaders

etc,etc.