Merriam-Webster does a terrific job of this, sending out a tantalizing stream of tweets that inform, delight, and inspire involvement. Yesterday, they tweeted a link to a post defining the difference between timber and timbre. On Twitter, I suggested they do one on the difference between peek, peak, and pique. (Misuse of these terms drives me nuts.)
This isn't the first time I've gotten a nod from Merriam-Webster. Earlier this year, I was quoted in a Merriam-Webster post about "Words from London," exploring "Words with London Origins." They quoted a Film Threat review I wrote years ago of "What Lies Beneath" in which I used the word "gaslighted."
In any case, if you want to see social done right, look no further than the dictionary.