One of the always-frustrating aspects of being a copy editor is that it requires an obsessive nature as well as a willingness to accept that perfection isn’t possible; no matter how many times your check the proofs, there’ll always be something that makes it into the final version. Obviously enough, such obsessiveness and knowing when to let go aren’t traits often found to co-exist in one mere human. And in correcting others’ mistakes—and in writing posts such as this—Muphry’s law looms large. All in all, you’re asking for trouble. But despite opening the door to public ridicule, we thought we’d add to our ‘how to’ series with something on copy-editing.