Something that I've discovered for myself recently is what you discover when you read your work out loud. I've started attending a writing circle and most weeks, we have a manuscript read. The number of errors you find is unreal (and slightly worrying!), but you also get a very good sense of pace, tone and impact.
I've now started doing it at home and would recommend people to give it a go. It won't work for everybody, but I have found it invaluable.