Encourage your friends and family

Do you really want to affect change in the American political landscape? Get your family and friends to vote in the November election. The sad reality of the situation over the last 30 years is that less than 62% of eligible voters actually vote in the Presidential elections and less than 40% vote in the "mid-term" elections in between. That means that no matter what the talking heads on television would like you to believe, nobody, and I mean nobody, has been elected to national office by a "majority of the people". That means that even President Obama, who the media pundits will tell you won by an "overwhelming" majority only got an actual 35% of the vote.
This is the reason that we see the offal that currently occupies public office. Not only do we have a significant majority of elected officials in Washington who have never actually held a real job, by that I mean a job that actually results in the creation of wealth, but most of them are elected by less than one third of the electorate. The only way to stop this travesty is to get the voter turnout above 75%.
Over and above the turnout, stop letting other people make your decisions for you. Do your own investigation of the candidates and arrive at your own choice. Yes, it is time consuming, but it is much easier now with the internet. There are literally millions of resources available to determine which candidate will uphold your views and, you can only hope, will uphold those views once they are in office.
When making your determination on candidate selection, make sure that you are viewing it from a "what is the proper role of government" perspective. Be aware that a large number of candidates, particularly the career politicians, view the proper role of the government as controlling all aspects of your life. The only significant difference in the two major parties is which social direction that control will swing.
Personally, I have voted in every election since the day I turned 18. I can't honestly say that I always did the appropriate amount of research in my candidate selection, particularly when I was younger, but I am getting better at it. Yes, it consumes a large amount of time doing actual candidate research, especially separating the wheat from the chaff, but it is worth every moment if I can vote for someone that actually believes in the original structure of the government. It takes even more effort to shake the brain-washing of the public education system about how great the "nanny state" is.
Get your family and friends to vote in November and let's turn this government back into one that is actually "of the people, by the people, for the people" instead of "of some of the people, by the political elite, for their own re-election interests". And finally, remember, if you don't vote, you have also waived your right to complain about the government.