I believe that the more you try to protect your identity the more you would be prone by organizations like NSA that would require a probe into your life online as to why you want to protect it in the first place.
Privacy itself is a very big grey area, you cannot be 100% certain your privacy is protected unless you are completely off-grid from internet, no amount of softwares will help you be completely off grid. Going to great lengths to secure your self will only result in others starting to get interested in why you would want to do it in the first place.
To me privacy is not a major concern, I take hackers & viruses / spyware / malware more seriously protecting my privacy as they can do more harm to you computer / data than by tracking what websites i visit to give me personalized ads.
I have been using my username every since i started on the internet & Google Chrome since forever & you can search my username on google and see most of it, my twitter / facebook page etc. but how does that put my privacy at risk is something i cannot understand.
Everyone visits porn sites, shops online for things and visit frequent websites, these details can be easily obtained from the websites if you protect your computer against it.