Everything (Math, RC, & CR) except for SC in the GMAT is to test your ability to make a complex thing simple, becaue that ability is crucial for your MBA. The only correct way to make everything simple is to identify what is the information behind words (that is RC) and how the information is deduced according to sound reasoning (that is CR). Just train yourself to identify the logic by studying how the information is derived. Keep in your mind that the same rule also works in RC.
For example, you can summarize a CR as the following: {Background of a topic} {After A happens, B happens} Conclusion: A leads to B What is assumption? How to weak or strengthen the assumption?
Same for RC; {A topic about sth} {Traditional view} {Author's view} {Explanation of author's view} {Evidence/Example to support} {Exception}
Don't try to translate Eng to Chinese =>logic =>translate back to English. It just wastes your time; Eventually, you should summarize the CR into one sentence, then it becomes more like a math formula, all you have to do is memorize it. Just like when you saw aX^2+bX+c=0, you can "feel" correct answers.