> (I actually have an account at SO, but haven't posted anything: I don't feel like an expert on anything enough to write an answer that would actually earn poi

> (I actually have an account at SO, but haven't posted anything: I don't feel like an expert on anything enough to write an answer that would actually earn points.) The best way to learn something is to teach - pick a question that you can't answer and spend some time researching it. Then write it up as if you were explaining it to yourself before you started looking. You'll come away with both points and more knowledge.