Google Dashboard

The Google Dashboard allows you to view and control data associated with the different products you use with your Google Account.

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Using Dashboard, I found that I had a ton of old RSS feeds still in Google Reader.

Worried about all that data stored in your Google account? Well, get to configuring and cleaning!

It should be noted that Google Dashboard only shows info you've consciously given to Google. It doesn’t let you know and control the data directly tied to your computer’s IP address, which is Google’s black box and data mine.