Free QR Codes for Business Cards
If you don't want potential clients to worry about scanning your business card or typing your information into their address book, consider putting a QR code on your business card. A QR code is an image which special software on most smartphones can decipher. You can embed text, links, images, or vCards into the code. They're easy to make and in a few minutes you can have a new business card that is much more versatile and paperless-office friendly.
When using a traditional business card, every person you hand your card to needs to come up with a system for getting that contact information into their address book. To alleviate this problem, you could try an electronic alternative to the traditional business card. But these alternatives haven't caught on completely yet.