yes, this is the best method. below you can find the 16 types and their sub-types that could appear in the CR section. for more knowledge and info that could help you to attack each type you should invest some time and money and buy a book that could teach you the CR and learn... hope this could help you a little
question types:
1 inference or must be true questions
1M [sub of 1] main point of the argument
2 strengthen
2N [sub of 2] Necessary assumption of the argument
2S [sub of 2] sufficient assumption
3 weaken the argument
3R [sub of 3] select the answer that is most weakened by the argument
4 what method does the argument uses
4F [sub of 4] logical flaw of the argument [there are about 70 major types of logical flaws that could appear]
5 parallel reasoning
5F [sub of 5] parallel the Flawed reasoning of the argument
6 resolve the apparent paradox that appears in the argument
7 what is the role of the portion of the argument that has been selected [they highlight a portion in stem and ask what role it plays in the stem]
8 which answer must be false base on the stem
PI what is the point at issue between 2 speakers in the stem
EA which answer will let you evaluate the argument.