Those annoying targeted browser ads....and what to do about them

Find advertising a bit much in the real world?
Just can't stand it when it's in your face in cyberspace?
From this week the ads Google displays won't just pull from the search terms you're using. Google will also look at all the sites you've visited lately.
Rather not have those inevitable ads targeted to fit your browsing habits?
Here's how to opt out of Google's new intrusion.