I'm designing my business cards and have decided to use a QR code on the back which links directly to my Facebook page. A 'like' button is also built into the code which people can click right from their phone linking directly to their own FB pages.
To use a QR code, folks will need a QR reader and a smart phone. I wrote a
blog about it here with a tutorial.
Out of pure curiosity people tend to try the QR codes to see "what's behind the code" and if that engages them...then...I'll use it hoping my business cards will have a longer shelf-life.
Here's a code to my FB page. Let me know if it works for you.
Janine