with your customers needs and demands, the better your customer service will be. Take advantage of vendor training programs and when possible, become ASE certified. Just having done so makes me hold myself up to a higher standard than before.
Have a plan, see it through
Set a time and sit down with a new business owner. Listen to his or her needs and go over the services that you provide so that you both can see where the other stands. You can then move forward into a partnership of sorts, providing good service to the end consumer. Good customer service extends past the good feelings your customer will associate with you, their service provider. They will return for more services and goods with increased frequency and confidence.