You may not take both the TOEFL and IELTS unless you want to find out in which of these tests you will perform better. If you are an engineering student then most likely you will have to work more on the verbal portion of the GRE than on the math part. If you are preparing for the verbal section then it is suggested to start preparing as early as possible. The sooner you start the more you will be able to improve your vocabulary to the maximum extent possible. Vocabulary plays a vital role especially when it comes to scoring well on the exam.
A right preparation demands a lot of focus and planning that can help you to improve your verbal score. In order to plan your preparation right, here are some of the easy ways to help you perform well on the test:
• Start maintaining a vocabulary register
• Try using flashcards as much as possible
• Keep a good book on vocabulary
• Start using online tools
• Develop a good reading habit
• Try reading articles from reputed journals
• Start listening to English conversations in movies or TV serials or even various English news channels.
As regards math, you may not have to start so early but remember that you would need good techniques and strategies in order to get a good score. If you develop good reading habits and also improve your vocabulary you will find yourself in good shape when you start preparing for the GRE. Set aside about three months time to prepare for the GRE before you take the real test.
Whether you are planning your preparation for GRE, TOEFL or IELTS the most important factor in all three tests is to practice, practice and practice. Always, remember that the more you learn the more you earn!