I'd like to see some researchers in the field of psychology and physiology take these existing theories and knowledge of human body and begin to see if we can measure in daily life.

If we had a tool that would let us know when we were most productive to do certain tasks we could prioritize tasks accordingly. We'd greatly improve efficiency in our tasks by doing them at times that are reported to be most effect by the tool.

It's ambitious and very broad, but if we're going into the realm of monitoring our appliances, cars, schools, etc why not try to monitor and utilize that data to make ourselves more effective?