The document discusses strategies for increasing sales through add-ons and impulse purchases. It suggests that shopping mimics our mating selection process and focuses on tapping into customers' emotions around checkout. Key strategies include placing low-cost, high-margin items near the register to encourage impulse buys and bundling accessories with the main purchase at decreasing price points. For add-on sales to work best, items should be within reach and visible right before payment to leverage the customer's emotional and hormonal state at that moment. Poor sales techniques like fear of losing the deal or laziness can cause associates to miss opportunities for extra profits through add-ons.