Recently the Fourth Amendment of the U.S. Constitution was gutted by the FISA. Despite the outrage, the bill was passed, and the mainstream news moves on to other news like lipsticks and pigs.
FISA may seem like a huge tragedy(and it is!), but it is one of many Constitutional violations committed in the last few presidencies. The Republicans and Democrats are both guilty.
Here's a few more examples:
H.R. 5122: John Warner National Defense Authorization Act of Fiscal Year 2007
This grants the president the ability to declare martial law without a vote in Congress.

Homeland Security Act

Patriot Act

I understand a feeling of helplessness, but there is a solution.
It's called the American Freedom Agenda Act(pdf).

The American Freedom Campaign summarize the bill well:
"The American Freedom Agenda Act would bar the use of evidence obtained through torture; require that federal intelligence gathering is conducted in accordance with the Foreign Intelligence Surveillance Act (FISA); create a mechanism for challenging presidential signing statements; repeal the Military Commissions Act, which, among other things, denies habeas corpus to certain detainees; prohibit kidnapping, detentions, and torture abroad; protect journalists who publish information received from the executive branch; and ensure that secret evidence is not used to designate individuals or organizations with a presence in the U.S. as foreign terrorists."

I implore you to call your representatives. If you aren't sure how to contact them, us Congress.org. It's an excellent source.

Now is the time to take action!