How to stay private

http://www.msn.com/en-us/news/technology/leaked-nsa-documents-reveal-how-to-hide-from-the-nsa/ar-BBhoOkV
I would also point out that you simply live as you did in the 1970's.  Keep everything offline (whether it's paper, LP's, CD's, etc.)

(Thanks for the link, Infidel753 !)