Two members of the Electronic Frontier Foundation talk about how it is possible over at Slate:

Despite all of the awareness-raising around surveillance that has taken place over the last year, many individuals feel disempowered, helpless to fight back. Efforts such as the February 11 initiative the Day We Fight Back aim to empower individuals to lobby their representatives for better regulation of mass surveillance. But legislation and policy are only part of the solution. In order to successfully protect our privacy, we must take an approach that looks at the whole picture: our behavior, the potential risks we face in disclosing data, and the person or entity posing those risks, whether a government or company. And in order to successfully fight off the feeling of futility, we must understand the threats we face.