Choose individual candidates who believe in and you trust to legislate based upon some core principles. Examine voting records when possible since speeches can be useless.
Too many people get caught up in the complexity of noise issues that aren't that important. These noise issues are like the trade-in value of your used car when you go to buy a new one... or the infamous "under coating". They're just mixed in with the important issue (price of the car) in order to confuse you and maximize the power that the dealer has in the negotiation.
Government abuse comes from too much government power. Too much government power comes from too much legislation and too much money through taxation and money printing.
Vote for politicians who understand the beauty of the limitations created by our Constitution and who can push for following a more strict interpretation of it.
In the end, it's all about power. Power corrupts. We want the people in government to have only as much power as they absolutely need to do things that we cannot do (national defense, TRUE interstate commerce regulation, etc.) The rest of the power we grant them is just ripe for abuse.