As a business owner and operator, it's very easy to spend your time in the back office rather than standing out front talking to your customers. People love to talk to the owner of a business - it's a mark of respect for you and for them.
No matter how busy you are, always take the time to talk to your customers. Ask them how they are finding dealing with your business. Get to know them and why they use your business. A few minutes' conversation with your customers can give you a lot of information. I find that if I stop and have a chat with my clients, I get to know them better and that strengthens our relationship, but it also inevitably leads to new business. Perhaps they were talking to someone who needs some marketing advice. Maybe I should give them a call...
When the owner of the business is to busy to talk to the people who pay the bills, there is a problem looming. It is important to remember that without customers, there is no business. I recommend that, occasionally during your working day, you stop what you are doing and take a few minutes to talk to your customers.