If you want to provide stellar customer service, you should let people know how long their problems will take to resolve and stay in contact with them throughout the process, writes Ross Kimbarovsky, co-founder of crowdSPRING. "[W]e've discovered that a big source of customer frustration is silence, not the actual time it takes to answer a customer's question or resolve their problem," he writes. Try to fix problems as quickly as possible, and avoid forcing customers to contact multiple people from your company.