“This means that Twitter has the ability to even track surfing habits (on Tweet button enabled websites) of users that have no Twitter account and have never visited a Twitter website before. When using the same browser to create an account at Twitter afterwards this collected data of the past can theoretically be linked to the freshly created profile then.” – Christian Schneider

1. Read the whole thing.
2. Delete your cookies
3. Tell your browser to refuse cookies
4. Tell your favorite website publishers you resent being opt-ed into multiple third-party behavior tracking programs without a way to opt-out.