I need some motivation.. Pls :(

It sounds like you're not learning from your mistakes.

You should be thoroughly reviewing, at the least, all the problems you get wrong.

Evaluate why you got it wrong, did you...
a) not read the question properly?
b) not understand the math concepts it tests?
c) mess up calculations during the process of solving it?

If you're finding a lot of missed questions fall under category (a), practice doing problems while being much more pro-active in reading the question. As you're reading the problem, identify any information or implications provided, then when you finish reading the problem, review this. It might sound like a lot to do while taking the test, but at most it should take a couple extra seconds.

Often the easiest 'reading the problem mistakes' (for me at least) tend to be:
i) assuming the variables are integers, when in reality that was never stated in the problem
ii) assuming the variables are positive, when in reality that was never stated in the problem
iii) in problems involving sequences, missing the keyboard 'unique' or 'consecutive' which both have serious implications regarding the solution.

The phrasing of GMAT questions is VERY deliberate. If a question does not say that a variable is an integer, you better believe that the answer will DEPEND on that the variable is not an integer. If a question says that a sequence is of consecutive positive integers, you can be sure that the solution will depend on the numbers in the sequence being consecutive AND positive.

Basically if you fail to account for ANY piece of information that was given in the prompt, you'll probably get the question wrong.

If you're finding that questions you're missing are falling under category (b), then it's very simple, learn the concepts There's really not much excuse for missing two questions that test the same concept because you dont know the concept. Because after you missed the first one, you should have gone and learned the concept.

I exaggerate, but really, category (b) is the easiest problem to fix, because you know what you missed, you know the concept it's testing, so now you just need to go learn the concept.

If you're missing problems that fall into category (c), there are a number of solutions. First, I would say try and do less steps in your head. If you're dealing with complicated equations, write them out, do the manipulations step by step on paper, instead of multiple steps in your head. This is the easiest way to reduce this type of error.


**Disclaimer: I'm not a GMAT expert by any stretch of the imagination, just a fellow test-taker offering my opinions.