Thanks, I've been interested in meta learning since finding out how powerful SRS systems can be for foreign languages, but I've never seen much similar to what you've written about mental data structures etc. In comparison, I tried Coursera's Learning How to Learn but was so basic, almost something you already would had to have known to complete a college degree in a difficult subject. I'd be fascinated if you ever have a chance to write any more about the C++ 250 concepts etc.