It is easy to achieve 1000 above score if u fallow the tips
1)keep the test date two months away from yours coaching and preparation.
2)use material like gre big book.
3)make a schedule of yours daily preparation.
4)take a mock test once a week.
5)fallow some websites like "www.drrajusvisualgre.com".
6)fallow the barrons wordlist .
7)don't be tense it is easy as if you made your preparation solid.