I’m with you there. I’m a writer, and I find that if I read the text out loud to myself I catch all kinds of stuff. Reading the text backwards also helps catch items otherwise missed. That is, read the last word, then the second to the last word, etc.
Andyman, clever tagline! :)
Another good tip is to do your final proof on paper. Maybe its just because that is how I learned to edit from the beginning, but I find I catch a lot of stuff on paper that slips by if I just read text on screen.