How to prepare for Math Level 2?

Is it a good idea to review notes from previous math courses (Geometry, Algebra 2/Trig, Pre-calculus, etc), or will reading from a prep book (such as Princeton Review or Barron’s) suffice?

I would say get the Princeton Book and Dr. Chung’s book.

Alright, but would you guys recommend reviewing (notes from) previous math courses?

Yes that would help as well.