Developing great employees attracts great customers.
If they're going to remember the problem, make sure they remember it fondly.
Occasionally problems will occur. When it happens to your customers, fix the problem fast. Make it your speed and generosity that gets remembered, not the problem.
The bottom line is a by-product of taking care of your main product - your customers.
If you were a customer, would you come back to buy your products or services?
Don't just talk about it, do it.