Critical reasoning.

1. Read the question first.
Classify as
a. assumption question
b. strengthen/weaken question
c. Inference question
2. Read the argument
3. Paraphrase
4. Keep the scope in mind (easier to remove wrong answers)
5. Prephrase the answer
6. Select best choice

Actually 3 questions the first day. Got two wrong. Was very scared to do the rest. Well it went on well the next day. Used this strategy got 41/50 questions right on the Kaplan GMAT.