I gotta a few techniques that I learned from a PMP classes that I'm taking and its really helpful:

First: If the question is too long read the last two lines: It will give you an idea of what they are asking. (Can save you time)

Second: If you don't know the answer, write it down with discarding the 2 that you don't think that arent correct then you can come back and think it clearly.

Third: Search for the keyword! Related to the answer. (CompTIA uses a lot of wording in their exams so if you find the keyword, it will guide you to the answer)

Fourth: Leave the sim for the end (you already know this :P)

I'm planning to take it Sec+ by May hopefully using this. If you have another please share it!!