Editing, then, is something which takes place throughout the writing process. But what about the final edits when you think you have your essay finished? It is a good idea to read through your finished document again a few times. One useful editing technique is to have one specific focus for each reading.
First, you might read the whole thing to make sure the document makes sense and that the material is presented in a logical order. As you read ask yourself the following:
Second, you might read with a focus on the accuracy of your citations and reference list or bibliography.
On a third reading you could check the grammar, punctuation and spelling.
Asking yourself these questions might help you to spot errors that you might have otherwise missed.
It might be useful to have a look at Working within word limits: A short guide
Here are some of the most commonly confused pairs of words. If you know that you find these distinctions tricky you could use a dictionary or grammar guide to look them up.