For most people, there’s nothing more stressful than writing a thank you note. But for Gina Hamadey, it not only became her passion—it became the basis for a book, I Want to Thank You (TarcherPerigee) ...

It’s time to bring back a valuable custom that has almost vanished: the art of handwritten thank-you notes. Here are three benefits of making this a habit, along with a complete how-to guide at the ...