'I want it and I want now!' 

How many times have you demanded that your voice is heard when you're angry? Regardless of the rights and wrongs, Twitter is used by many consumers as a significant customer service tool. Ignore this feed at your peril.  

Social media is a powerful tool for both customers and business; it works both ways. Who's managing your reputation and strategy? Is it ad hoc or do you have a plan? Here are some companies that understand the importance of great customer service.