Ask HN: How do you datamine yourself?

Hello HN! I was thinking about collecting data about myself and using it to draw conclusions about correlations between my actions, feelings and health. So far, I was not able to find a good way to track all this data. There seems to be no application I could find that - I can host myself (this data is very sensitive) - can track all properties I want via computer / webinterface / mobile app. - is extensible Apart from that I was thinking about what kind of data to track. So far I could come up with the following: - data about health and physical activity like sports, step count, walking distance, weight - movement profile - Usage of my digital devices (computer, mobile device): When did I turn it on / off, keystrokes count, display brightness, which apps / websites did I use, meta data about messaging, ... Most of the data will probably require a lot of effort to track. I would later not only draw conclusions about myself, but could also learn about data science. I would also be interested if you do something like this and what kind of things you found out! Thank you! :)