After the Deadline, a service that would have saved me countless hours back in the day, is simply an incredible ( and adaptive ) contextual spelling and grammar checker.  The service,  run by Raphael Mudge,  is now part of Automattic and we turned it on live today on WordPress.com.   If you are running self-hosted WordPress, there is a plugin at WordPress.org that you should download.

Best way to describe this service is by watching this video and checking out this example of the NYT.