For over 250 days (and counting), I've tracked how I've spent every minute of my time into different categories such as Socialising, Exercise, Work, Website, etc.
Why do I do this? To better understand where my time is going. It's similar to how people keep track of their money through expenses and budgets. So I'm just tracking time. Also it's suuuper fun to track and look at.
This is the pie chart of my life.