We've said this before and we'll say it again: Don't vote!
By that we mean value your right to vote by not voting if you have not informed yourself about the election. If you haven't taken the time to learn enough about what will be decided in the upcoming election, don't cheapen your vote by using it willy-nilly. If you only have an informed preference for some of the candidates and proposals on the ballot, then vote for them and skip the rest. If the partisans for neither side of a race have done enough to get your commitment to their cause, then none of them merit your vote.
You value your vote by withholding it as much as by casting it.