5. The Incredible Hand Trick: This is a weird one but probably the key difference for me in verbal in getting to that 98th percentile. This is def more useful for Verbal than Quant but you can obv use it for either. Now many times with any type of question you will skim the answers and eliminate some but return to the rest to examine further. This can sometimes be inefficient as you may lose track of which answers you 'eliminated'. So during practice exams (and this must be tested during practice exams first obv), when I started looking at the answer options for a given question, I would keep my left palm open with all five fingers. Each option had a corresponding finger - (A thumb, B pointer, C middle, D ring, E little). As I eliminated an option, I would "close" the corresponding finger. This way after round 1 of eliminations, you just peak at your hand and you know which answers you need to re-examine rather than go back and sort of lose track and be like "oh wait did i eliminate this one? and why was that?" etc etc. Trust me - if done correctly, this can save A LOT of time. It certainly did for me. So just as an example say you look through the answers and you spot immediate mistakes with C and D, then you're making the spiderman sign with your left hand, and then you go for the next round and just examine A, B and E. Yes, it's weird - but genuinely this helped me a lot. My initial GMAT (V40) was marred but having to rush at the end and get successive answers wrong.
I've just used it while practicing and it really helps!! (even though the hand can look very awkward at times)