Ignore bar exam white noise. Have faith you studied and did your level best. Never look back, unless you've concocted a sturdy and reliable time machine that allows you to adjust your answers accordingly.
The GRE is an exam designed for prospective graduate students in many liberal arts fields.So, is it time to start memorizing hundreds of words until your vision is blurred? No! This exam is about studying smarter, not harder.
Where do your study strategies come from? Maybe a teacher gave you specific instruction on how best to learn material? Simple trial-and-error? All reasonable possibilities. However, here's some food for thought: it's also worth considering what psychological science has to say on the matter.
It's a weird feeling for a 19-year-old realizing what you thought was right when you were 16, is not actually correct at all. I found this out the hard way this past week studying for my history midterm.