Are you one of those types who smirked devilishly through Eats, Shoots & Leaves? Whether you're a strict grammarian or looking to learn a bit more on language, ThatWhichMatter's Twitter feed is worth subscribing to.
It's less than a week old, but the Twitter account—which our non-Twitter-ing readers can grab an RSS feed from—has already made a habit of delivering lessons on fewer versus less, i.g. versus i.e., and on less factual but just as relevant concerns, such as whether "Best" or "Sincerely" makes for a better email sign-off.
Got another feed, email list, or other source of regular grammar tips and reminders? Tell us about it in the comments.