As a non-native english speaker, what's the best way to prep for the GMAT?

Answer 1

1. Watch the news. Nightly news in English moves fast - no fancy words - and the newscasters famously have clean and neutral accents, not regional ones, for you to copy. And hear how it all goes together.
2. Read our classics. They use some old-fashioned language that you will need to know for the GMAT even though modern writers are not writing that way anymore. Point is, you will read those terms in context as opposed to all those flashcards lacking in context. Trust me on this.
3. Read the bedroom. Books like Lady Chatterly's Lover, Fanny Hill, and Tropic of Cancer will keep your attention and still build your vocabulary.