You’ve gone through your story and edited it some and taken out the scenes you decided were no longer needed. Now you need to sit down and go through your story with a highlighter. Read the story slowly, preferably out loud if you aren’t disturbing anyone, and don’t just read what you think you wrote. Read only what you actually wrote and make sure all your character and story points are still valid. Often my view of my character, especially details and background, changes throughout the book. Maybe I thought she had a cousin early in the book only to decide later in the writing process that her parent was an only child. Readers will notice those things and editors are paid to notice those differing details. If you wrote a story over a few months or years, you may have very different backgrounds to your characters that will confuse editors and lose you a deal on what could otherwise be a very well written story with excellent characters, at least at the end of the book. Details can make or break a story and reading through your story in a short period of time such as a week or weekend will allow you to keep all those details in your head and allow you to notice differences.
As you’re reading your story look for clichés or dialogues that go on too long. Early in the writing process it is easy to write a cliché or explain everything at once so things are on paper quickly. During the following revisions is when you need to notice those things and rewrite or remove such things.