I create a different email address for every web site I sign up to, and use different passwords and usernames. I have a Facebook account under my real name, but I post false information, false updates, and false photos by morphing four faces together and photoshopping it into the image. It's very easy to get those four faces at various angles because they are pictures of people in my extended family. My Facebook friends are all random people that accepted me for some reason. I clear my browser and use a different user agent for each of the sites I visit. Any other browsing is done in a private mode in a different browser on a per site basis and I rotate the browser, and this is in a VM that I refresh every day with a backup image. I also force https. I have two different VPN services I use based on the sites I want to visit.