Have you got your essay scaffolds and stats already set up? If not make a few main scaffolds for key question categories (e.g. globalisation, macro policy, micro policy, enviro etc.) and then practice adjusting the scaffolds to different past question types. Memorising the stats is also important. Ideally your main scaffolds would have those stats and then you see how you can re-use them across the different question types as you try and adapt to them. If the new questions don't fit for those stats/your arguments then think:
1) Is this a niche question unlikely to be asked? (some of the time when there is a niche question the second one is easier) If yes, you can consider prioritising learning other areas.
2) If no, then think about creating a new scaffold for that question 'type,' or adapting your existing scaffold if that scaffold was too fitted to a specific question. Think about adapting the stats too if required or learning new ones. I liked learning general stats like Australia's growth since 1990 averaged to now (same with CPI and unemployment) then a few key periods that show when policy did/didn't achieve the goals. That is a great starting point for macro policy basically, and helps with micro (as long as you add a few examples of policies to go with the periods).
Basic areas to cover for scaffolds at a minimum I would say: globalisation and Australia, case study, enviro, micro (if you focus on labour market policies that ticks off labour market policy questions to an extent too, and if you focus on trade and protectionism reforms that overlaps with globalisation, enviro reforms can also be micro so can use them to overlap), macro policy (monetary and fiscal policy stances and impact on achieving outcomes)
Also keeping abreast of new stats is good.
Good luck!
