EFF publishes guide on surveillance self-defense
The link is even SSL based for secure web browsing 
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The Electronic Frontier Foundation is the most well known organization for protecting your rights in the digital domain. Their surveillance self-defense guide is a 10,000 ft comprehensive view on the various techniques that can be used to spy on you electronically. While, we are slowly becoming a country where people are complacent about the government watching us all the time. Realistically, it accomplishes very little by means of stopping “Terrorism” and does a great deal in terms of shifting power out of the hands of the citizens. Further, the potential for abuse is large.
This guide is quite relevant for our times…
http://en.wikipedia.org/wiki/NSA_warrantless_surveillance_controversy
http://en.wikipedia.org/wiki/Surveillance_abuse
http://www.aclu.org/police/spying/index.html
http://www.ftc.gov/bcp/edu/microsites/idtheft/
etc etc etc