Firms spend millions of dollars to discover how to get consumers to purchase their products, and invariably, the companies that succeed most impressively are those that understand the importance of appealing to the senses and psyche. Sight, sound, touch, taste and smell — all play major roles in getting someone to make a purchase. In addition, companies must also cultivate strong positive associations with their product, and do their best to eliminate any negative ones. Consider how a few industries utilize such techniques.