I believe the most benefit could be reaped by adding one two metrics that RescueTime doesn't have. Possibly LOCs, or "emails written" for someone who does that

I believe the most benefit could be reaped by adding one two metrics that RescueTime doesn't have. Possibly LOCs, or "emails written" for someone who does that a lot – or maybe even a subjective assessment of your day's productivity. Then you could find real correlations with, for example, taking a day off or amount of sleep etc.