After getting field experience it is good to improve your techniques with constant sales improvement, both sales presentations use the T L M M S principle which shows the customer NEEDS. A way to get into first stage management 52 PPT slides, built from hand holding and spending time in front of the customer, Time-Labour-Money-Materials-Safety builds your product/products into the item your customer truly NEEDS. Spend the time and build your Features-Benefits pitch so it is smooth and insistent, and the buyer believes he NEEDS what you have on offer.