chetan2u, thanks mate for the words of encouragement. I believe I have already identified my weaknesses, and I will work on them to improve myself.
so far:
Quant
1. Complex absolute value questions
2. Coordinate geometry questions that require some outside of the box thinking
3. Combinatorics, especially the ones with restrictions/special requirements - this is a very tough topic for me..though I like to solve such questions.
4. Conditional probability that requires combinatorics
5. Inscribed/Circumscribed figures (unfortunately on
Magoosh there isn't such a topic

)
Verbal
1. SC - comparison, especially the one where ellipsis has an important meaning - I don't know why, but this topic has always created me tough times.
2. SC - pronouns - on some very tricky questions...
3. SC - some rare idioms...I try to improve on this topic and know that idioms are no longer "tested", but since English is my third language, I might be unaware of some idiomatic usages.
4. CR - inference questions - on the higher difficulty level, this type of questions is a nightmare for me. I usually eliminate the answer choices that bring new information first, but this technique is not always working
5. CR - assumption type of questions - I believe this is on par with inference. Tough ones, but still trying to improve. Before GMAT, I never heard about assumptions/premises or even such type of questions/structures. I believe this is the main reason why I have problems with CR.
6. CR - sometimes understanding the meaning. Meaning is essential in solving CR questions. If you do not understand what the argument says, you will have problems on all types of questions.
7. RC - wasn't a fan of reading before...and I believe I see the negative impact now. Nonetheless, I'm trying to catch up

so far, these are my main weaknesses. I started
e-gmat's SC course (from the beginning - to make sure I did not forget/miss anything) and began to read Powerscore's CR Bible, first chapters nothing new yet..maybe later I will see some tricks & techniques how to crack these bad boys.
smartguy595 thanks mate!!!
HKD1710 I had timing issues on my second and third attempt. Later, during my CAT's I always finished 7-10-15 minutes earlier. As
EMPOWERgmatRichC advised me, if the question is too tough to solve it, you have to learn to let it go. Fortunately for me, on GMAT day I saw very few tough questions, and luckily I had enough time to attempt to solve them...yet I was going crazy how I blacked out while solving some easy questions...I believe that those questions were experimental ones, and in the end did not count towards the final score.
On SC, i spent on average 1.14 minutes. on RC - 1.76 minutes, and on CR - 2.07.
just a quick update:
my sub-scores:
V
SC - 30 (before 19 - improved 11 points)
CR - 28 (before 21 - improved 7 points)
RC - 31 (before 32 -

)
Q
PS-49 (before 48 - improved 1 point)
DS-49 (before 35 - improved 14 points)
Arithmetic-48 (before 39 - improved 9 points)
Algebra&Geometry-49 (before 47 - improved 2 points)