For the process of Sales Mastery visit this link.
Sales has a bad name because of the image of salesmen. However, sales are a process of influence, a transfer of emotion from yourself to the customer that you have so much belief in what you are selling that they are compelled to buy.
The best form of sales is true belief in your product or service, that it will benefit the customer so much that they MUST buy from you.
Influence is understanding the deep emotional needs of the customer, stirring those into action.