One can choose not to vote and make a claim that not doing so is just as valid; not voting is an expression of a disdain for the process and/or the candidates or you don't think it is important or you just don't care. The only reason I disagree with this way of thinking is that I have in the past voted for candidates that had no chance of winning, but did shared my views of how the country should govern. There is always room on the ballot for any candidate and room on the airways and internet and newsprint for varied views. The effective way to make your voice heard is to not bemoan the process but rather participate in it to make it better.
Your insignificance is only validated by your non-participation. Exercise your right to vote. Do not take any constitutional right you have for granted. No matter which candidate you vote for tomorrow, I hope America wins.