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 "**** 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!