Facing the toughly and developed competitive society,communication between two people,a person and a company or among corporations is becoming frequent.Letters and emails are the most popular forms among all the means used in the business.Good writing may lead you to gain more opportunities,which is the stepping stone to success.An effective business letter will tell the readers what it wants to say.In order to communicate effectively,all the letters should be written briefly and promptly.You should ensure the letters have established layout and structure.