Hello,
use PGP for private eMails, with all the bells and whistles, and drive the NSA crazy (and the BND).
And NEVER use facebook, private blogs or whatever - unless you fill it with useless, untrue crap - but even this may reveal one or two hints about you .. e.g. when exactly you were sitting in front of your PC, or whatever ..
Being paranoid does not mean they are not chasing you
Greetings,
Catfish