The document discusses the Quantified Self movement, which involves incorporating technology to track various metrics about one's daily life, including inputs like food consumed, states like mood and arousal, and performance both mental and physical. This self-monitoring combines wearable sensors and computing and is also known as lifelogging. Other names for self-tracking data to improve functioning include self-tracking, auto-analytics, body hacking, and self-quantifying. The document provides resources for learning more about Quantified Self including the main website and local meetup group.