I use Rescue Time, and I've seen some benefit. Specifically, I closed my Facebook & LiveJournal accounts after I saw how much time I was spending on them. But

I use Rescue Time, and I've seen some benefit. Specifically, I closed my Facebook & LiveJournal accounts after I saw how much time I was spending on them. But you don't need RescueTime to figure that out ;) Vitamin-R for Mac ( http://www.publicspace.net/Vitamin-R/ http://www.publicspace.net/Vitamin-R/ ) has tools for tracking concentration levels throughout the day/week. Currently it's showing that my concentration is worst on days when I exercise. That was a surprise. Tracking data is interesting, but it's easy to spend too much time looking at the data instead of deriving value from it.