Microsensors in your shoes compile data on where you go and what you do. Your workout clothes track your daily progress at the gym and tell you when to slow down or speed up. And as you sleep, a headband monitors your REM patterns. A far-fetched sci-fi fantasy? Not at all.
The more vivid and concrete an image is the more likely it is to stick in the mind. Elaboration is the key to the memory palace. Some people's memory palaces are rather barren, however. Notably, people who suffer from serious depression.