Lifehacker has an interesting post on the social uses of business card. Here’s are their ideas about situations in which you could use a card:
Class reunions. You’re going to run into a ton of people with which you want to exchange information. Instead of constantly busting out the pen and paper, just hand them your card.
Networking between jobs. You’re not currently employed, so you don’t have a business card. Or if you do, it has your old employer’s info on it. While you’re looking for work, have a calling card ready to present to potential contacts and leads.
Parties. If you’re planning an informal party or get together, write down your address and the time of the party on the back. When you run into people you’d like to see there, give them one of your cards and invite them over. Sometimes calling cards also come with small envelopes, sized to fit your card. You can therefore always use your calling cards as traditional invitations sent through the mail. Also, if your calling card comes with an envelope, you can use them as gift cards.
The classroom. It’s often hard to make the leap from being “in-class” friends to “outside of class” friends. Give someone you enjoy chatting with in class your calling card. They’ll probably start posting on your Facebook page and your friendship will take off from there. Or use the card to set up a study group.
If you’re not carrying a card, maybe you should read the whole post.
