From wired.com
VENTURE ONLINE NOWADAYS, and your presence is immediately logged and tracked in all manner of ways. Sometimes this can be helpful—like when you want to see new movies similar to ones you’ve watched in the past—but very often it feels invasive and difficult to control.
Here we’re going to show you how to cover some of those tracks, or not to leave any in the first place. This isn’t quite the same as going completely invisible online, or encrypting every single thing you do. But it should help you sweep up most records of your online activity that you’d rather disappear.