Business card holding butler
Here is one of the most pressing first world problems: Where to store your business cards. The solution: A very committed butler to hold them:
He will patiently stay put on your desk and show your business card to visitors. Even better: On his back, he holds a whole stack of them cards.
And here he is without a card:
You can make one, too, out of a sheet of cardboard. Here is the template as a PDF file. If the butler is too bourgeois for your taste, check out the mad scientist. Here is a tutorial on how to make the holder.