Not voting accomplishes nothing.

Now if our elections were based on a percentage of people voting, it might mean something, but that's not how our system works.
In a representative government, it is the duty of all citizens to vote for the best candidate, not some mythical perfect candidate.
To paraphrase Donny Rumsfield -- you go to the polls with the candidates you have and you make the best of what is most likely a compromise decision.
Choosing not to vote is choosing not to support our form of governance.
Please give serious consideration to vote. Yes, it may seem like we are always picking the lessor of two evils or as South Park puts it, between a turd and a douche. But that's who we have to work with.
If you are not happy with the candidates, then work on the campaign of someone you do like. But let's make the system work as opposed to abandoning it.