A method is provided for selecting a pillow and mattress based upon an empirical measurement of an individual's pillow selection criteria, mattress selection criteria and sleep characteristics. In accordance with the method, an individual's position on a diagnostic mattress and a controller associated with the diagnostic mattress is operated to measure a pressure of the air mattress via a pressure sensor. The measured pressure of the individual positioned on the diagnostic mattress is correlated to a recommended support level. The individual's recommended support level is correlated to a support characteristic thereby allowing the individual to select a fixed support structure. A system incorporating the principles of the method is also disclosed.