The same goes for money, which some people believe is taboo to mention in a thank-you card. "You can write 'thank you for the monetary gift,'" she tells TODAY.com.

A thank you note is a special way to show your appreciation, so keep the focus there. Keep it short, simple and to the point. For the holiday season, here are some simple, yet thoughtful things ...

One card simply stated: “Thank You for Being My Person.” According to the Greeting Card Assn., Americans purchase around 6.5 billion cards each year.