The absolute easiest thing? Outrage + phone calls / letters.
It would take a mere 1% of the US population to give a shit, and it would light D.C. up like a Christmas tree. Bury their phones and inboxes in just a few hundred thousand calls and emails per day and every member of Congress would instantly stand to attention and respond positive.
It's such a trivial % of the overall population as to be disgusting that it probably can't be mustered.
Next step down the line, Americans need to start caring about their civil liberties again. They need to start caring about their privacy again. They need to stop buying into the fake war on terror and drugs. They need to elect a President that isn't a fraud, someone who will use executive order powers - if necessary - to aggressively break the police state and domestic espionage racket. The US Federal Government is extraordinarily violent and militarized. It has to be de-militarized, and you could only do that by abolishing the military industrial complex. It'd require a President to openly talk to the US public about what was happening and why, it'd have to be a public conversation. This, realistically, can never happen until there's a collapse (leaving a vacuum of respected authority).
In a word, Americans need to take back responsibility for their own well being, and stop trusting that the government will fix or solve the destruction of the last decade (which the government caused). The key phrase is personal responsibility, it can't start anywhere else.
As an aside... there's always a lot of back and forth discussion here about Socialism vs Capitalism, the concept of big government, etc. You know why America can't emulate the Nordic model? Culturally, to its core, we have an aggressive, violent government (busy waging war 24/7 in a dozen countries). You know what happens when you have a BIG government that is aggressive and violent? It was a fantasy to ever think that aggression would always just point overseas.