Best way to study for this?

So I'm taking it in March, 4 months to go

I'm through 7 chapters of the 26 in the ASM manual, and I'd estimate I maybe know 30% of the material. 50-70% if I have a formula sheet in front of me. I estimate it's going to get exponentially more difficult.

Should I

a) stick to a standard study plan and try to get through X pages / lessons a day with the goal of finishing the material mid January so I can do all practice problems / exams until March, or

b) just start doing nonstop practice problems now and focus on memorizing the formulas as I go because this is basically what's going to end up happening anyways


Best way to study for this?