There are many routines with Business Cards. . . I believe there is a book out entitled "Here's My Card" that has a few dozen bits.
That said, I should point out that there is a growing trend amongst pros that suggests doing tricks with YOUR OWN card, isn't smart in that it psychologically plants the idea that you don't respect your business in that you mutilate the card. . . there are other reasons that have been brought up in discussion so one may want to consider this and deliberately work with one card of lesser quality when doing tricks. . . even excusing them as being your "old cards" so you have a reason to introduce the nicer quality cards you actually give out to serious business folk. . . in other words, you make that nicer card extra special and something you don't hand out to any random stranger. It's subtle psychology but it can pay off in short time when you work things right.
The other thing to remember is that most any card trick can be done with playing cards. I know a guy in Canada who actually does collect business cards of all kinds. He made up a "deck" of 52 business cards composed of "four suits" so to speak -- four different kinds of businesses. He even went so far as to use different "marks" on the cards that allowed him to assign values such as Ace, Duce, Trey, etc. (think "Phone Numbers).
Why would he do this? you ask
Because a large number of people involved with Mentalism will go out of their way to avoid using Playing Cards in their work; psychological playing cards weaken what we do, as well as our reputation (placing us in the status of being a Magician rather than a Wonder Worker. . . someone that's "more" than a trickster).
The bottom line is, use your imagination. . . there's more than one reason to study Scarnes, or Royal Road. . .
