… the staff isn’t focused on selling stuff, it’s focused on building relationships and trying to make people’s lives better. That may sound hokey, but it’s true. The staff is exceptionally well trained, and they’re not on commission, so it makes no difference to them if they sell you an expensive new computer or help you make your old one run better so you’re happy with it. Their job is to figure out what you need and help you get it, even if it’s a product Apple doesn’t carry. Compare that with other retailers where the emphasis is on cross-selling and upselling and, basically, encouraging customers to buy more, even if they don’t want or need it…
— Ron Johnson, former VP of retail at Apple.
You can read the whole article on the lessons he learnt with the Apple stores.