Business cards allow you to easily network with other professionals in the industry and more importantly prospects. Once it starts snowing, ask for approval from local businesses to leave your business card in their store. This is a really effective way to get different prospects. In addition to local businesses, leaving your business cards at community centers is a good option since it is a non for profit. Non-for-profits are more likely to let you leave your business cards there. This is in large part due to the fact that you would not be directly competing with a non for profit.