Dear CNN,
Thank you for telling us, in a recent story, when to send a thank-you note by email and when to send one by snail mail. You snarkfully instructed us to send a handwritten card when we get a present in the mail; an email when we receive a gift in person. And both — an email, then a card — after a job interview. And thank you, thank you for reminding us to never offer personal thanks in a public Facebook message. Nobody "likes" that.