For years, I taught GRE prep for Kaplan. I taught grad school hopefuls how to get to the right answer...even if they knew nothing about the question at all. Or next to nothing. There are lots of tricks.
One great tip for the vocabulary questions is to try to determine the "charge" of the word. What we English majors refer to as the word's connotation. Does it have a positive charge? A negative charge? Or is it neutral? Most of the time, it's pretty easy to tell if the word that's supposed to go in the blank is a plus-word or a minus-word and, since words tend to sound like what they mean, you really can trust your ear.My students loved this trick and were good at it. Except when it came to neutral words that we've turned positive. Like proximity. That's a neutral word. There's nothing intrinsically positive about it. You can be close to someone or something you love. But you can also be close to a dumpster. The edge of a cliff. Death. About half of my students put a little + over proximity, though.