I don't know how effective it will be, but until something changes, I plan on very vocally being a one-issue voter. I will vote for, and donate to the campaigns of, anyone who will do something to rein in the surveillance monster, and I will make sure that my sitting representative and senators are aware of this.
Unfortunately, one of my senators is Dianne "It's called defending America" Feinstein, and she's got her job for another 5 years, so I'm not expecting much in her case.
Waste of time. No one cares about your vote anymore. If you really care, find like minded people and go into politics yourself. You'll have to start local, then move to state, but even the state level can begin to have an effect. I suspect their may be enough people to make actual change, but so far they waste time by doing online petitions, sending emails to politicians or voting.
If you want to change the US at this point you're going to have to do what the founding father's did: become the government you want.
Unfortunately, one of my senators is Dianne "It's called defending America" Feinstein, and she's got her job for another 5 years, so I'm not expecting much in her case.