JoelleAS
1- I am having mostly difficulties in the verbal section specifically in the critical reasoning part (I have studied in Kaplan/Princeston/GMAT books and did the exercices) however it seems that I am not getting the pattern and right method to do it. I really need tips for the critical reasoning section.Would you please advise?
Ensure that you understand the argument (most questions will present you with an argument) and the logic behind that argument before you try solving the question. Familiarize yourself with the common patterns seen in GMAT CR. Don't try to solve questions using "shortcuts" (rely on logic).
JoelleAS
2- I am doing several exercises at home (Sentence Correction, Data Sufficiency) and I am doing OK. Now when I time myself I don't do as well.
Should I time from the beginning or wait till I understand first?
If your test is in the next 3 weeks, it makes sense to do more timed practice than untimed.
JoelleAS
3- My test is in the next 3 weeks, how often do you propose I should practice an entire GMAT test? How many tests and how frequent? Say 1 per day?
One test every day is probably unrealistic. Take a call, but 3-5 is a more reasonable target.
JoelleAS
4- For test day, should I study for the IR and AWA and practice some exercises?Since they are not taken into account I am skipping them in my studies.
This depends on what how your target schools view those sections. You should, however, include them in your practice tests so that you can simulate exam day conditions more accurately.
JoelleAS
5- is there like guidelines or tips on what do to for the previod just before test day? I mean the day before how to be mentally and physically prepared?
Most test takers solve only a few questions, and focus on relaxing and sleeping well. Make sure that the small details like ID, center location, and food have already been taken care of.