Well, I've been working on Chopin's thirds etude for a while, and after the trauma and feelings of extreme failure the trills and stuff are becoming less unnatural and more (dare I say it?) even, and I'm beginning to feel I might actually get this. Aside from silver bullets (they do NOT exist, right?) what are some good points or practice methods for these things? Also, outside of the etude, is there value in scaling in thirds (i.e., g minor + third above, two hands)?
Why are these things supposed do be so darned difficult, anyway?