Hi,
GRE is not an easy exam especially if you are aiming for good colleges. You should prepare well, practice as many mock test as you can. I am also preparing for my GRE exam and let see how is goes. One tip which I can give you is, in case you are a smart phone user - download GRE exam app from playstore. Their are many providers Gradestack, Magoosh etc. This will help you prepare for the GRE whenever you get some free time during the day. While you are travelling, during your break anytime. I am using Gradestack GRE exam prep app which has close to 3500 vocalubary flashcard, 1000 + test questions and study notes to prepare from and trust me it is coming very handy. You can also try to use it and see how it works for you. Apart from this you can also get online resouirces available on internet.
Wish you all the best for the exam.