We've all been there: You make a trip to IKEA to pick up one thing – some of those tea lights from the marketplace, let's say – and what happens? You end up leaving with a carload of flat-packed boxes, having spent way more than you intended. Why? Because IKEA is masterful at orchestrating the shopping experience and guiding your every move – where you go and what you see. In a regular department store, you could just run in, grab your tea lights and bolt, but at IKEA the store layout is carefully designed for one purpose: to keep you in the store longer.