Total Recall - MyLifeBits

MyLifeBits is a Microsoft research project by Gordon Bell & Jim Gemmell. Their idea is to capture as much data as possible that we come across every day. So from a camera hanging on their chest, they automatically capture a photo every 30 sec . They also constantly record audio, take geotaged photo's, digitize all their paper documents and so on. 

See the video for a more detailed explanation of their work and some use cases.I really like the health story (min 17) : 'they look a bit better, don't they"

More interesting read and watching on their Total Recall project page.