Don't let customer service slip on a bad olive.

It can be said that customer service is, "The art of knowing what people are NOT willing to put up with, and then raising the bar a notch." Too much service and the unit cost magnifies into a weight on profits. Ironically, over-servicing can waste resources, stifling investment in other areas that could give a greater overall customer experience. However, if you under-service, your customers may desert you - as other ex Vodaphone customers will testify.