Self-Monitoring
Self-monitoring (or self-tracking) links to big data, life logging and the quantified self movement. The trend started in the US, with sports and fitness fanatics using wearable sensors to measure things such as how far they’d run, but it’s now extended into health and wellbeing and many people are now monitoring how much they’re eating, how many calories they’re burning, how much (and what type of) sleep they’re getting and even what mood they are in using mobile or wearable sensors. As you’d imagine, self-tracking fits with gamification too, as data can be linked with rewards, status and even with private forms of currency. In the future we could be using wearables to track everything from air quality and time spent reading to (rather ironically) time spent on devices.

Nike + Fuel Band, FitBit and mySleep Analyser are good early examples.
More on self-tracking here.