Hi Pratik,
Welcome to GMAT Club and let me assure you that now you have come to right place . I will suggest you to take GMAT practice exam which comes for free and evaluate your Quant and verbal score . Do an analysis for your verbal score weak and strong areas. For SC i will suggest you to read Manhattan SC and read the entire book for 4 to 5 times . Daily practice 2 RCs from GMAT club, 10 SC on different topics and 5 CR from gmatclub.
Below is the link for practicing Quant and verbal sections based on topics and difficulty level .
P.S I will suggest you to opt for
GMAT club test during your last month of preparation or when you are ready with your preparation . The questions in
GMAT club test are more than enough to score 700+ in GMAT .
Best of luck
I need more practice in RC, as far as i have observed i'm good at cr...for sc haven't tested it yet... but i can very well say that for me RC is my everest.