Very good point and I did that, I marked problems throughout MERM that I felt emphasized concepts needed to master the subject matter. Then later went back to work through them w/o looking at the answers. I'll continue to do that and now that I'm more familiar with MERM, I'll also spend more time practicing more problems.Actually, I would say I advocate making the most of the problems you likely have already (MERM companion problems, practice tests, etc).
If you have book with 1,001 worked problems you're just as likely to "fuck that" to a hard problem you don't understand and move on, than you are to say "I will understand this problem if it kills me." I advocate understanding concepts over "getting good at solving problems". I realize I may be in the minority here on EB...
Anyway, GOOD LUCK!!
Thanks again!