How do I figure out what I'm doing wrong?

[meanjean]

I've been playing now for several months, mostly at the $2-$4 tables at PP. I seem to have huge upswings and downswings in my "Bankroll". At times I can be up a few hundred bucks and then it seems like I always crash and burn and wind up depositing more (I'm down 350 now and those of you who took it may thank me later). I've read several books (Lee, Hilger, and now SSHE) and am understanding slowly that I SUCK at flop and post-flop play. It's even in my ability level to follow the starting hand charts so I think I'm okay there.

This darling realization of poor play came after reading the Hand Quizzes in SSHE. I got most of them wrong. I'm currently going through each question individually and making sure I understand the ideas behind each. I hope to eventually go back through my hand histories and look at all the mistakes I've made as a way of educating myself. But here is the "Catch 22", since I really stink at the hand quizzes this isn't natural for me and I obviously must have thought I was making the right plays before or I wouldn't have made them so in some way I'm going to have to teach myself how to become an expert in flop concepts. Finally, to the questions: 1. Are there more of these hand quizzes with answers anywhere on the web where I can keep trying to grasp the concepts? 2. Is there a system for "post-mortem's" on hand histories where I can say with confidence these were my mistakes and this is why it is a mistake?

thanks for any advise and as always feel free to flame away