Great advice for people like myself that edit their work wrongly! I don't how many times I have re-read back to myself my writing from the screen and failed to see all my mistakes.
Print Out Your Work
Always do this. Always. It's a pain, but when you're talking performance reviews, that 20-yard hassle of a walk to the printer could mean the difference between a 4% or a 5% raise.
Here's why: As any writer or editor will tell you, critiquing someone else's work is much easier than deconstructing your own, because outside eyes bring a fresh perspective. To approach your own work critically, you need to simulate this "outsider" perspective by viewing it in a form other than the one you wrote it in.
— How To Edit Your Own Writing by Lifehacker