Some storeowners believe upselling is a questionable practice — a way of forcing customers into buying something they might regret. Billionaire entrepreneur Bill Bartmann, though, sees it as "a process of helping people to purchase additional services or products that they already need ... saving time in the long run." See Retailing Tips: How and When to Upsell Customers in the June issue of TDmonthly Magazine for examples of what, and how, to upsell. photo: Nuchi from Little Little Little Toy Co.