Onlife is a neat beta applicaiton that keeps track of and records many of your daily activities.
Onlife...observes your every interaction with sofware applications such as Safari, Mail and iChat and then creates a personal shoebox of all the web pages you visit, emails you read, documents you write and much more. Onlife then indexes the contents of your shoebox, makes it searchable and displays all the interactions between you and your favorite apps over time.
It's not only good for helping you find those random Web pages and e-mails you lose. It provides a context to help you get a handle on where your spending your time. That can be very helpful to those who are trying to Get Things Done and finding that they're spending too much time surfing, for example.
Onlife is a free beta for OS X 10.3.