Hi Jisha,
The first thing you need to do after you have decided to give the GMAT is to learn as much about it as you can.
You can go through the mba.com and understand what the GMAT is all about, what is tested and how it is tested.
There are three major portions of your preparation:
1. Fundamentals and concepts building
2. Practice Questions
3. CATs
1. Fundamentals and concepts building: How you want to work on this area depends on the type of student are. If you are self motivated and determined, then you can go for text books and learn from them. If not, then you should go for an online course. All the good prep companies including ours give you a free trial. Try to use the trial period and find which one is the best for you.
Also, try to stick to only one course that you choose. The teaching styles of people are different and referring to many courses might not be beneficial.
2. Practice Questions: The more you practice the better. But having said that, make sure that you do not practice from unidentified sources and they harm you preparation more than they improve it. Solve all the official questions from the
OG, Verbal Guide.
3. CATs: This is as important as it can get. You can learn all the concepts you can and solve all the problems. But if you do not have the right exam temperament, there are high chances that you will not be able to do well on the test (of course there are exceptions always). Always attempt a full CAT including the AWA and the IR portion.
In addition to a preparatory course, I would recommend you to buy the Exam Pack 1 and Question Pack1 from mba.com
As a first step, I agree with Mike, take the diagnostic test and identify your weak areas and then work on them
Broad areas are:
Quants: PS and DS
Verbal: SC, RC and CR
Follow a study plan. You can find them here:
gmat-study-plan-how-to-start-your-gmat-prep-80727.html?fl=menuAll the best!