Whether you’re a short story writer, novelist, copywriter or non-fiction writer, always check your work through. If you don’t and your script is full of spelling mistakes, missing passages of text, omitted full stops and commas, then the editor/publisher will think you don’t care about your work. He’ll think that if you don’t care, then why should he?
It’s a good idea to set your work aside for a few days. That way, when you look at it again, you’re doing so with ‘fresh eyes’ and so any mistakes are easier to spot.