At some point most tinkerers and makers have to take the plunge into the real world - the world of suits and dividends and business cards. Without going completely "American Psycho" on your asses: business cards are important. In many ways they are our keys to the business world; the first impression making a massive impact, and potentially the difference between eating a Burger King in front of your computer and getting taken to a French restaurant for a business meeting.
The question remains, how does one make a lasting impression with a simple card - and how to you prevent your card from being thrown away, used as kindling or emergency filter tips?
Try printing it in your hand, in front of the person you are trying to impress.
Buy using cheapish components ($80?) you can print thermal business cards to hand out to any potential client, investor or friend. These can be changed whenever you need and really make an impact because they are something new and engaging.