I love this exhibit invitation I received from Ron White.
It's a note card with one of his beautiful images on the front and the reception information on a separate sheet of paper (along with his business card).
Because he didn't print on the note card, I can reuse the card and help him promote his art. Conveniently, it has his information and Web site on the back of the card–in probably a 14-point font–large enough so you can't ignore it.
So, I get a free card and he gets extra publicity. Win-win!
He might have considered adding at the bottom of the insert something along the lines of this: "Please send this note card with my photography on it to a friend who might enjoy it." Always be asking!