The trick is to determine what uniquely identifies your best customers. Fortunately, deriving this information is not difficult, and in many cases can be obtained from innocuous questions. Consider a manufacturer of baby goods and the fact that families with new babies often purchase multi-passenger vehicles. This manufacturer could build an effective mailing list by surveying recent car purchasers and noting which respondents had traded in sports cars for SUVs. Your information gathering technique of course will vary, but the identifying information always comprises the same three pieces -- demographic information, geographic location, and purchasing history. Demographic Information

Consumer behavior varies with age, sex, education, income, occupation, marital status, and family size. These demographic parameters are typically used to describe consumers, but they