There are differing opinions on this and there have been academic studies on what levers can an unpopular government keep themselves in power. From everything I have ever read and listened to, the most effective way for the average citizen to check government abuse is to engage in the mainstream media.

There is a reason why the US Constitution first amendment sought to protect the "free press". Support the free press, buy a subscription. Several subscriptions. Write letters to the editor. Share articles with your family and friends.