Dr. Hans H. Moosa, MD, handed me his business card many years ago. On the front was a picture of Spider-Man; on the back, his contact information.
As he gave it to me, he said, "Kevin, with great power comes great responsibility."
I still have that card, and I carry it with me every day. It's a great reminder of him and the message he lived by.
If you were designing a new business card today, what would you put on it that someone would want to keep for years?