Organising your ideas in the  paragraph plays a crucial role in your essay writing.  This adds a follow to your writing. If not followed properly, chances are much that you wouldn't be able to score well in Essay Writing. Lets discuss about Essay Writing in general.

Firstly,  An essay begins with an introduction followed by body part, and lastly, has a conclusion on the entire essay. The introduction part begins with a generalised statement, which is usually the paraphased sentence on the essay prompt given in the essay writing. This is followed by providing the main ideas which you shall be discussing on later in the body part of the essay. You should keep in mind that the ideas which you mention in the introduction part should be in the form of abstract idea. This shall help you to provide more information or reasons for explaining your idea. 

Further, You should begin writing your body paragraph by stating the main idea in the first sentence, but in a different way. This sentence in the body paragraph is know as a Topic Sentence, which gives the reader an idea as to what this paragraph about. Following this, You shall explain the main idea by giving supportive information through examples or elaborating more about the idea mentioned in the topic sentence. Similarly, construct the second paragraph using the idea mentioned in the introduction part. 

Finally, Summarize all the information of Body parts by selecting the main ideas and given your opinion.