You don’t throw up your hands and run out of the lab. What you do is you identify the procedure and what went wrong and then correct it. If you think of [writing] simply as information, you can get closer to success.
This tip from Morrison addresses what I think is the hardest part of self-editing, disassociating yourself from your own work. She advises to take a clinical approach and try to identify the problem and use that information to fix your work.