Install Noscript (Be selective of which domains you allow, if a website doesnt work without scripting enabled on the TLD you're visiting, go elsewhere)
Delete cookies upon broswser closing
Dont install Flash
There are other ways and means of tracking such as screen resolution, user-agent string, the list is quite long, but enough of these datasets creates a fairly unique fingerprint.
I wish I could transport back to the nineties, the internet was so much better then, before it became commercial