If you disable Cookies and Javascript you will stop probably 90% or more of tracking. How much tracking is done without using Cookies and without Javascript? KISSMetrics? What else?
There's lots of ways to track you. Here's a sampling: <http://samy.pl/evercookie/>; Turning off cookies and JavaScript will stop many, but not all. It also makes many popular websites nearly unusable. Browsing with JS and cookies off, and selectively turning them on, is an option that is only really practical for experts.
Without JS and Cookies the web is too crippled. It's not an option for most people. DNT tries to fix this on a more legal level than technical.