Google Dashboard: Find Out What Google Knows About You

If you’re concerned that Google is starting to know a bit too much about you, you might be interested to find out that Google has released Google Dashboard, a window onto the data that Google stores about your accounts.
All you need to do is go to www.google.com/dashboard and log into your account. You’ll be presented with a list of all of the Google services that you use, and the data that is stored in them.