is this possible or is it pure luck

Hello, I just recently started studying for the lsat and am hoping to take the LSAT in February...

I started off at a 130 and am now at a 155 (which isn't the best I'm aware). throughout my time studying I found that i do better on preptests when I finish a question and then reveal the answer. also, I manage to do much better when i write every single thing out, but that takes a lot of time which i wont have during the real thing.

Has anyone gone through this? if so any advice would be great... my goal is to at least get a 170