One hour a day is a lot.
@OP - Would recommend you ask yourself that question IF you get a *bad* ATAR. Premeditating what you MIGHT do in the future in case that happens makes it more likely to happen.
On a somewhat related note, I used to fake my report at school during Years 8-10, because...
To be fair, I didn't leave Maths that late. But, yeah, don't let your internals get you down. I came near the bottom of the year for my English trials and still managed to do well enough in the end.
Being confident in yourself is the main thing. If you view it as being difficult, or out of reach, that makes it a lot harder than it should be.
As for specific study tips, I'm one of the worst people to ask for advice from.
Meanwhile...in Economics.
I reckon OP is asking a legitimate question. After studying opportunity cost and intrinsic/extrinsic cos all over again in Micro, I think a lot of you guys are being too dismissive.
99.95 - $20000
80 - $1000
55 - $50