This is an interesting Australian Election site: How I Should Vote? If you want to try it out you can use my old postcode: 2103. The site asks you a bunch of topical election questions and then based on the candidates in your electorate it figures your how your preferential vote should look. Preferential voting is relatively unique to Australia. Antony Green (Australia's pre-eminent election analyst) has a great explanation as to how it works. Remember to vote on Saturday: it's the law!