How to get the most from Qantas' new Frequent Flyer program

Qantas today unveiled major changes to its Frequent Flyer program, adding options to fly on any day where seats are available and an expanded range of other products to its traditional use-points-and-fly-if-you're-lucky approach. Where can the best deals be had and how can you ensure you get the flights you want?
How to get the most from Qantas' new Frequent Flyer program