Count on this: early in the election results on November 2, the major media networks will announce that Obama is winning in a landslide. This can--if heeded--have the effect of suppressing voter turnout. Why will they do this? First, they expect it on the basis of polls (which are often skewed). Second, they have favored Obama the entire campaign and cannot imagine him losing. Third, by announcing an Obama victory early on, they hope to stop those who have not voted for McCain to from doing so, since their vote would be meaningless.
In light of this, please do not believe them; do not let them rob you of your vote. This may be a very close election and much is at stake.