CR clicked for me once I stopped reading it like a reading comprehension passage and started treating it as a logic exercise. The big shift: the argument always has a gap between the evidence and the conclusion. Your job on most question types is to find that gap, or fill it, or blow it open.
For Strengthen/Weaken questions (the most common type in GMAT Focus), I always pre-think what kind of fact would hurt or help the argument before looking at the choices. That stops you from getting pulled toward answer choices that sound related but don't actually touch the logic.
For Assumption questions, the negation test is your best friend. Take an answer choice, flip it to the negative, and if the argument falls apart, that's your answer. I practiced this until it felt automatic.
The timer anxiety is real. What helped me was accepting that CR rewards deliberate reading, not fast reading. Rushing the stimulus to save 15 seconds usually costs you 60 seconds of confusion in the answer choices. Slow down on the argument, speed up on eliminating wrong answers.
Honestly just do 20-30 official CR questions a week and track WHY you got each one wrong. Pattern recognition builds fast from there.