How do you define your target customer? Are there segments that are more valuable than others. It helps to rank them by current value, future value, etc. to ensure you are spending the most effort serving the right customers.
How do you build customer relationships? How do you identify them? How do you cultivate them? Which means or methods are the most successful at converting them?
What does it cost to acquire your customers? Maintain them? Are there other direct or indirect costs?