Hi albaqsan,

Since you've only been studying for 2 weeks, you're still fairly early on in your studies. Some Test Takers need far more time than that to see significant improvement.

If you're not clear on the "content" that is consistently tested on GMAT questions, then some content focus is probably warranted (math formulas, grammar rules, etc.). You might find that necessary content in your current resources; if you need more than what you currently have access to, then some additional resources are probably warranted.

To your last question, you will certainly learns lots of "rules" while preparing for the GMAT, but from a tactical standpoint, there are NOT 100 different GMAT tactics. As an example, on any given Quant question, there are usually several ways to go about solving, but it's the same handful of approaches for all the Quant questions. You'll have to get comfortable with the various tactics and practice a great deal. I wouldn't expect anyone to have done either in the first 2 weeks of one's studies. You should keep working. If you don't see any improvement in the next few weeks, some adjustments will probably need to be made.

GMAT assassins aren't born, they're made,
Rich