After you’ve published a blog post or other writing to the Web, it’s helpful to do a postmortem. Look at what you’ve written in different browsers. Read it on different devices. And if you find an error, do a proofreading postmortem: Try to ascertain why the error slipped past your eyes or the eyes of your proofreader.
Of course, this advice does not apply to the Yahoo! front page, where errors are acceptable and postmortems are misspelled: