Power to their elbow.

Say what you like about Amazon, but they sure put giving the customer what they want at the top of their list.  What's the worst part of ordering something from them?  It's trying to ensure you are in to meet the delivery.  Go out for an hour or so and Sod's Law says you'll return to find one of those pesky "sorry you were out" cards through the door.  So what are Amazon doing?  They are installing big lockers all around the place - in supermarkets, libraries, the atria of public buildings and the like.  When you place your order you choose the location which suits you best and are then given a unique code which allows you to access your package at a time of your choosing.  Now that's customer service!