Simple, timed exercises are highly effective. I (and almost everyone I know) has one built that they use. I can look through their work and know (1) if they are

Simple, timed exercises are highly effective. I (and almost everyone I know) has one built that they use. I can look through their work and know (1) if they are really an export, and (2) if they're even trainable. Happy to share noah (dot) barr (at) GOOG's email service