The quick summary is:
Earn points
If time is of the essence I would recommend car hire, a hotel or Qantas Cash if you have your card set up (although I seem to recall this may only work for Australian residents). You could also send a nice friend in Australia a dozen bottles of wine from Cellarmasters - don't get knocked over by the rush of volunteers! If you can figure it out you may also be able to shop on Ebay.
I think there also other posts on this topic if you search this forum.