I've heard people say that if you read your story backwards it makes it easier to see the mistakes. Isn't that hard to do? I mean, reading the words backwards makes them different words, doesn't it? Even if you start at "The End" it would read, "Dne Eth." How can that help? Thank you. (yes, thinking up these questions is way more fun than folding laundry or cleaning boogers off the wall--please, don't have another contest like this for a while so I can get caught up with my housework!)
Actually, reading your manuscript out of context is a great way to look for mistakes. I generally take it one line or paragraph at a time (reading the line forward) from the end of the novel.
Another help is reading it out loud. To another person. When I read out loud to just me, I tend to ignore myself.
What are some other tips?