Hi RamanGupta19,
Business Schools generally do NOT care how old your GMAT Score is (as long as the Score is still valid - meaning that it is no more than 5 years old when you apply). While certain types of knowledge will fade with time (for example, you might not remember certain Geometry formulas 3-4 years after using them), the overall critical thinking skills needed to score at a high level on the GMAT typically do NOT fade (since those skills are not about 'content knowledge'; they're about how you organize information, spot and take advantage of patterns, etc.). Since those skills are the ones that top Business Schools want their Applicants to have, an older Score isn't a "bad" thing. As it stands, taking the GMAT far in advance of when you actually "need" the Score to apply shows that you are a forward-thinker who can plan ahead and achieve long-term goals. This is all meant to say that if you score at a high level on the GMAT, then THAT is what matters; not when you took the Exam.
From your post, it's not clear whether you're just beginning your studies or you've been studying for some time. Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied? How many hours do you typically study each week?
2) What study materials have you used so far?
3) On what dates did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your overall goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich