"Who? Nobody I know personally who isn't corrupt is running. I'd vote for them."
Get to know the people who are running. By law they are contactable (Election Commission rules) and by design they care about you voting for them. So take a moment this round of elections and personally talk to everyone you can who is running. Really, its not that hard. If you put the sweetener in that you've got your $100 donation to the campaign of the person you find acceptable, its even easier.
It is very important to note that "almost nothing" is not "nothing." The tea party has had a disproportionate effect on the republican party votes because they are enough to swing votes one way or the other. The 'career' politicians give every impression of hating them (from both parties).
Personally I find the tea party 'line' way more conservative than I like but I massively respect that they chose to volunteer for serving the public.
"But sadly the way things are setup to work guarantees I pretty much get two equally bad choices."
This misplaces the blame and that is why it doesn't get 'fixed'. It is not 'the way things are setup', it is the participation of the electorate (or lack thereof) which currently creates the situation you dislike so strongly. A majority of elections for Congress in 2010 were decided by significantly less than half the number of people who didn't vote. Think about that for a minute. The people not voting are screwing up the country. They have been 'trained' to not vote by stories and folks who would rather they not realize that their not voting gives folks who want to run the system power.
Talk to people running for office.
Vote for the one that isn't corrupt.
Get at least two and as many as you can of your non-voting neighbors and friends to vote.
You will help change the world, I guarantee it.
Who? Nobody I know personally who isn't corrupt is running. I'd vote for them.
But sadly the way things are setup to work guarantees I pretty much get two equally bad choices.
Even when some group gets lots of support and gets themselves stealth elected -- the recent tea party elections are a fantastic example (despite my personal disagreements with their political philosophy), they find their ability to change the broken system reduced to almost nothing.