Basic principles to keep in mind while preparing for GRE
Learn your words starting with Roots Suffix & Prefix first
. Buy a Thesaurus which has synonyms & antonyms listed after each word, and how the word is used in different contexts. Those who know some foreign languages like Latin or Greek will benefit heavily because most GRE words come from these languages. If ever you don't come to a proper answer choice then do an intelligent guess. As at times you can use the root or stem to dig up the meaning of an alien word.
Basic principles to keep in mind while preparing for GRE