Quote Originally Posted by Rabbitz View Post
Once the layout is done, just prior to 'print master ready', then it should be proofread. Properly. Don't rely on spellcheckers and grammar checkers. Don't rely on a bunch of folk giving it a 'once over'. Print it out, grab a red pen and study it paragraph by paragraph, sentence by sentence, line by line, clause by clause. If in doubt, look it up. Keep in mind that Proofreading is actually a trade, and had a three year apprenticeship - back when publishing houses and newspapers had standards.
And it cannot be proofread straight away by the person that authored it. Best option is to have someone not involved with the writing do the proofreading, or put it away for a few weeks and come back to it. This helps to cover all the bases and pick up those little errors that you can easily skim over if you wrote the content.