When should I start studying for USH and Physics?

<p>I’m taking reasoning in October. I wanna take the two subject tests in November. In USH I got a 700 and Physics I got a 740 with maybe a week or two’s worth of preparation this year. I want 780+ in both of them. When should I start? Now? The only reason I’m not is because November is far away and I don’t want to forget stuff. What should I do?? (I have all the necessary books btw- AMSCO, Barrons, REA for USH and PR, Sparknotes, and Kaplan for Physics)</p>

<p>i think ,since you have much time left, you should review your textbooks. the prep books don’t help a lot if you don’t know the basic knowledge thorougly.
and you should really focus on the reasoning test. it counts more than SAT subject tests.</p>