Quick plug for something we're working on that's related: chronos, launched on Android this week http://bit.ly/chronos-android (iOS next week: http://www.getchronos.com)

We passively track how you spend your time – you don't have to do anything, and it lets you know where you’ve gone, with whom, and breaks your time into categories (work, sleep, exercise, home, social, etc.).

-charlie