This document discusses upselling and suggestive selling strategies. Upselling involves selling a higher-end or more fully-featured version of a product a customer already owns or is buying. Suggestive selling involves recommending complementary products from different categories. Effective upselling and suggestive selling requires understanding customer psychology, having product knowledge, easing decision making, offering value over being pushy, and tracking sales progress to increase average purchase cost, revenue, and customer loyalty. Examples provided include adding cheeses or drinks to food orders and informing customers of new or promotional items.