You can follow below preparation tips for GRE preparation

Verbal Reasoning

- Try to learn new words and try to use them.

- Practice as many reading comprehensions as possible.

- Brush up your basic grammar and learn tenses.

Quantitative Reasoning

The main topics in this section includes Arithmetic, Algebra, Geometry and Data analysis.

Questions which will asked in the exam will be concepts based. So, try towork on your basics to score good marks.

Analytical Writing

To score good marks in this section you must read and analyse and practice writing as well. 

You need to practice a lot to score good marks in GRE. Solve previous year papers as well for your practice. There is no negative marking in GRE.

Good luck!!