E is for editing your writing.
When editing it can include fixing spelling errors, punctuation, run on sentences, and other grammar related issues.
Editing your content can include deleting areas that are not as related to the topic on hand as you thought it was. This can include adding more relevant content to what you are writing.
Editing can also include adding relevant links to your piece once you have it finished.
When you edit your piece of work, you can read it to yourself or outloud to find any errors you may have missed the first time around. You can also have another person read your work to find any errors you may have missed.
These are just a few ways to help you edit your written work.