If you do not know how the LSAT tests for specific skills or how it can easily trick people into picking the wrong answers, then I do not think you should make your own methods.
Regardless if an experimental self made method seems to work, if you do not truly understand the job/tasks/skills required to answer the questions objectively correct.

I want to point out, your directions conflict with each other.
"Don't negate EVERYTHING"
and
"Like negate what you have been told previously"
Which is it?

Your arguement also manages to say a whole lot of nothing.
LSAT hard
Experiment
Unlearn what you learned from (?) and teach yourself
Refine your self teachings
If works good, if not work adjust Don't negate anything
Gather inspiration from reading
Experiment from what you read

LSAT is a skills test, you are assuming the OP or reader can teach themselves the skills required for the LSAT.
And I believe you are assuming what others have told OP or readers are not helping the OP or reader do well on the LSAT.

I would advise others who are planning to take the LSAT, to NOT take your advise.