Listen to your customers as they are among the greatest sources of information in order to continue to improve, expand and grow. On this improvement and growth process, listen to what folks are saying and engage with them across all avenues, in particular across social media. This focus on customer service and proactive approach is what distinguishes you from others.
Many companies can deliver a good product or a service, but the experience and how you make your customers feel is what stands out. Think Amazon as you do this and how they are known for this no questions asked, speed and customer focused approach. This is (among other things) what has enabled them to grow at tremendous speed and why they became one of the largest companies across the world.