Prominently display your business cards and information with a business card rack or display. Clients and potential customers often use business card information to fill out contact information on their smart phones, computers, calendars or contact lists. Business card display racks are an inexpensive way to advertise your business. Suggest your clients take two cards and pass one along to a friend. Good customers are often happy to give you a referral. A business card makes it easy for them to do just that. Other popular items include: chart holders, wall magazine racks, magazine display rack systems and mail organizer.