If you can measure it, you can improve it. With that in mind I plan on measuring more things about myself in 2013 as I continue optimizing areas of my life. I currently do a quarterly review of how I spend my time and an annual 50K ft look – but I think there can be benefit to a daily granularity. In general, I am a strong advocate of data based decision making.  Often this does not require complicated computation or advanced statistical techniques – it simply requires having the right question in mind and some relevant data to look at over time. Trends will show themselves. This is especially true when the area in question is not already highly optimized. As anyone that works with data will tell you, though, getting clean relevant data is often what most of the effort goes into on a project. There are a lot of