Keys for the perfect presentacion

In the article "How to Wow ' Em Like Steve Jobs" by Carmine Rooster, she shows the differences way to present or sell the products by Apple Computer, and Steve Jobs is the responsible person to transmit not only the products but also the all benefits.
The author shows the five keys that uses Jobs for a perfect presentation. The first key is "sell the benefit" to sell the external product but also to inform to the listener or possible buyers the advantages to acquire the product. The second key: it is to prepare him with enough anticipation on the information that is going away it to give the listeners. The third key is to maintain the approach visual with the audience so was obtained that I public approach in the presentation of Power Point that can be prepared but that really listens to with attention the words of the person who presents/displays the product. The fourth key is to have much enthusiasm, passion and energy at the moment of the presentation so that the audience feels those positive vibrations and were much but kind to which this saying of the product and the villa and completes key is that at the end of the presentation always a added value occurs him to the product.