Tricks of the Trade Some television commercials, trying to break through the ennui built up in the viewer by the plethora of competition, employ humor. Others feature a comely girl as the pretext of getting the viewer to stay tuned in. At times raucous music, accompanied by some frenetic activities, is designed to preclude the viewer's loss of attention. The advertiser will employ every bit of artifice at the film maker's command to make a trenchant commercial. The diversity of appeals made to the viewer is the concomitant of the many ways people react to the commercial. A great deal of time and money has gone into placing the consumer's psychological make-up under scrutiny. worth ones' weight in gold--extremely valuable, very useful. The coach said the new star center was worth his weight in gold.