In this day and age, most people promote their work online. However, printing off business cards and promoting your work offline can help you get more clients. You can hand them out at different conventions, especially if you have a booth displaying your work if you offer tangible goods. One of my coworker's handed me a business card with his wife's etsy shop information printed on it. I was interested in seeing what she had to offer, so I checked out her shop. Do you have business cards printed off? Did you gain new clients from handing out your business cards?