If you are wondering exactly which party to vote for this year, you should go along to Glassbooth. This is a site that by getting you to vote on the relative importance of issues and answering some policy type questions, can advise you on which electoral party best meets your personal preference.
In an election year in which parties have been relatively vague publicly about their policies, this is a good way to discover what they are actually standing for. You might just be surprised by the result that comes back to you!
Initially created for the US elections this week, it was recently expanded to include details of the New Zealand election (which is why the majority of the non-core functionality is still US-centric).