I have been going through Rita's guide, scoring 90-60% (mainly low 70's%) the first time around (after reading the chapter), and have started reading Andy Crowe's book and am starting the pmperfect.com 50 set questions.

I must say that taking questions are really beneficial to me learning this material.

One question I must ask is this, when I am going over the tests, and the ones I miss - should I go over all the questions or just the ones I miss