In Australia as you may know they use AV, which is an awful system. However, this is not going to change in time for the General Election in Australia thus I urge all Australians as their first preference to vote for the Liberal Party who will really make Australia a better place. For Second Preference I would consider the Australian Sex Party.
If you don't like getting f#*@£$ over then make sure you support your civil liberties. Tony Abbott in the Liberal Party will make sure that doesn't happen but just to be sure show your support of the Australian Sex Party too.