It is a common question that haunts anyone who wants to increase liberty. When looking at all the ways government is advancing and liberty is diminishing, it is tempting to give in to despair. It is true that there is little that one person can do. Any large scale changes will involve large group efforts, true. So should a person give up and wait for said group efforts?
No, there is no reason to give in to despair. There is no reason to give up. There is still something that can be done. One can be prepared to ride the depression out and come out and prepare to come out on the other side.
The first thing to do is make sure that one is not fooled by the official propaganda. Anyone who has an evidence based view of economics knows that the current depression has utterly disproven Keynesian and Monetarist economics and vindicated Austrian economics. In spite of that, government economists and major media economists continue with the party line about government managed economies.
Keeping the facts in mind reveals that this is the worst time to sell gold for cash and to get further into debt. In spite of pronouncements that the depression is over, it is clear that the money pumped into the economy has done nothing more than re-inflated a few bubbles and paid off the major bankers. Using the knowledge gained by Austrian Economics, it is much easier to avoid the remaining bubbles.
Individually, the only thing a person can do is ensure his own house is in order. That's why many people advise starting a farm and other common sense measures.
Given how the police have gotten more dangerous, the best plan is not to confront them but to stay out of their sight as much as possible. Any talking back, even if in the right, is considered "contempt of cop" and results in an arrest for "disorderly conduct". A lucky person won't be tasered during the arrest for the crime of saying "what am I being arrested for?"
Of course, be armed, be ready to defend yourself. Be as prepared as possible for the various emergencies that may come up if the predictions of Austrian Economists continue to come to pass as they have done to this point. The only way to act to advance liberty is if the activist is able to act in the first place.