Have trouble proofreading your own copy? Try this free method
But now I can using this:
Free text to speech software with Naturally Sounding Voices -- Free NaturalReader
It's a text-to-speech reader (free version) that you can download. You just copy and paste your text into it and listen. It's amazing how much easier it is to pick out mistakes.
Ron
(I ran this through it before I posted and found two left out words)