Everything ordinary has the potential to be extraordinary.
If you want to stay in business, satisfy customers. If you want to excel in business, delight customers.
Ask your loyal customers for positive comments about your products and your service. Then post these testimonials where other customers and prospects can enjoy them.
Exceeding expectations is where satisfaction ends and loyalty begins.
What matters more? What you said you'd do, what you hoped to do, or what you did?
When things go wrong, your best recovery effort is required. But don't just provide the missing piece (that's the recovery), also provide uniquely personal assistance (that's the memorable effort).