What I've found that works:
Spamming MC using the BoS's question generator (I swear I've done every question twice by now)
Doing sets of SA Qs by topic (also practices handwriting)
Essay plans (I don't believe in memorising essays, waste of time, so I'd rather perfect my ability to prep an answer in the exam)
Writing practice essays and getting feedback (mainly for practicing essay technique and trying out new things, I don't memorise them at all)
Memorising stats to use in the exam (literally the only thing I actively memorise in Eco)
I'm sure our local state ranker
mreditor16 has some stories of his own from last year!