Most of us know you should read something out loud when proofreading, but we may miss critical errors. We insert words we think are there, but aren't, because we wrote it. Using the text-to-speech function on your device will help prevent your internal autocorrect from missing errors.
Over at TUAW, they suggest using the Mac's and iOS's built-in text to speech function. Windows, Android and Chrome have text-to-speech too, though, so this tip works anywhere. You'll hear words that are missing and punctuation that's off when the text doesn't sound right. It's no replacement for a human, but can help in a pinch."
Via John Evans