If you're voting for Anyone But Harper, see the Project Democracy website. Enter your postal code and it'll tell you who the best candidate is in your riding to beat the Conservative candidate. Here's Edmonton-Strathcona, for example.
If you're voting for the first time, see the Elections Canada website for information on how, where, and when you can vote.
The election results will be online here.
If you want to make a final donation to a party or a local riding association: Donate to the Liberals. Donate to the NDP.