Discussing politics with people on the other side of the isle and finding common ground is frankly more important than voting today.
the parties no longer represent us. We are lead to fight over wedge issues while the elites take everything. A vote doesn't matter by itself either.
The only way a vote will have any impact is if you use it to add just a little sting to any political activity you do elsewhere. If your only political action is voting, you might as well stay home.
The only real hope is if a large bipartisan alliance forms. That's more important than if we get Romney or Obama as President (two candidates who are mostly different in terms of party affiliation and skin color, but not in terms of approaches to governance).