What personal metrics do you track?
urlwolf: only three things. I draw a line on a calendar and try not to break the line.
1- what I eat. Have I eaten at least 1 meal raw? 
2- writing. Have I written for at least 2 hrs?
3- additional item. Last month it was learning colemak (done). Doing 2hrs of company promotion was another month's goal. This month, it's learning scipy well (2hr  day)