What does a good introduction to an essay consist of?

A good introduction should be clear and to the point, it should include:

- A brief opening sentence that shows the reader the general theme of your essay 

- A thesis statement that clearly points out your position ("In this essay it will be argued that...") 

- The outline/plan of your essay ("This analysis will be divided into x points...")

* An introduction's length is normally around 10% of your text