Business Insider asked etiquette experts when it's appropriate to send a handwritten thank-you note. They said a note is essential after staying at someone's home or receiving a personalized gift.

After a particularly bad 2007, lawyer John Kralik decided to start 2008 with a serious New Year's resolution: to be thankful for the good things and people in his life. So he spent the next year ...

DEAR MISS MANNERS: You have been influential in my decision to take up a new hobby this year: mailing handwritten letters to friends and family for a variety of occasions. Miss Manners: That baby name ...

Congratulations, graduating seniors! After years of effort and anticipation, you are officially moving to the next stage of life, via a piece of paper as flimsy as it is significant: the thank-you ...