Move all of the buildings around and cover them up with big, colourful rectangles so that no one can find anything.
Since just knowing where things are is the old way of doing things, microphones and speakers will be placed everywhere. To find a place one simply asks. The speakers will respond with a friendly AI assistant who will direct you to specific products for purchase based on that confidential conversation you had with your lawyer the other day.
That brings us to surveillance. Surveillance, surveillance, surveillance. There should be no place that is not covered by video cameras. For example, bathroom stalls shall have at least 6 cameras, one for each wall, one on the ceiling, and the "bottoms up" view.
With the new total surveillance system comes targeted advertising. Going back to our bathroom stall example, a large and colourful screen would be placed on the door to show targeted ads. One such ad could consist of our beloved character "Clippy" exclaiming "It looks like you are dealing with prostate cancer..."