The currently rising popularity of 'personal informatics' devices that track and analyze physical activity and health patterns will play an essential role in promoting healthy habits and awareness of our well-being as we age.
Yeah, Quantified Self is pretty amazing! I came across it a couple years back.
Before that I used to track things like work efficiency and workout habits manually, but after attending a couple QS meet-ups, I learned about all types of technology and services available for self-tracking.
With many of them automatically collecting and analyzing data, it has really helped me work toward and achieve my goals (both in health and work)