Remember reading about Gary Wolf's presentation at TED about tracking and using personal metrics? Stephen Wolfram has a pretty practical answer about how you can use the information in today's New York Times: he looked at 23 year's worth of email and phone usage to find "patterns in his personal activity that might be linked to bursts of creativity." Also noted: Larry Smarr who "wears one wireless sensor to monitor the calories he burns and another to see how well he sleeps. He is keeping track of the bacteria in his body, about 100 different variables in his blood and many other fine points in his biochemistry.
After examining the data, he makes changes to improve his health. (So far, he’s lost weight and gained hours of deep sleep, he says.)"