If you agree with me that this government is out of control in its foreign and domestic policies, especially--but not exclusively--in its willingness to spend, spend, spend; then I urge you to do one of two things in the next election.
Suggestion 1: Vote Libertarian. Currently, there's not much (if any) chance for a Libertarian candidate to win an election, but don't think that the ruling parties won't notice and begin to make accommodations if they see an increase in Libertarian support.
Suggestion 2: Don't vote. If you can't bring yourself to support the Libertarian cause (i.e. reduced/constitutional government; maximum civil liberties), at least don't carry on as part of the current system. Voting Republican won't change things for the better: just look at the Republicans' record when they had power. Voting Democrat won't change things for the better either: Just take a look around.