My vote in this election probably won't count

Not because of electoral fraud, or because my hand is too shaky to make an "x" or anything else like that. But rather, my riding is a enough of an NDP stronghold that nothing I do will make a difference. Rosario Marchese is, according to local wisdom as well as my unscientific observation of signs in the riding just going to kill in Trinity-Spadina. If I chose to support the NDP, my vote would just add to a landslide (so it appears), if I chose the Liberals or the Greens or even *gasp* the Tories, it wouldn't matter. You see, it's a smallish cadre of voters in key swing ridings that are going to matter on October 10th.