Spaced repetition algorithms and programs are a godsend. Org-drill and diligence has increased my retained knowledge of vocabulary, grammar, mathematics, and logic.

Other people probably use Mnemosyne which is great but having space repetition in Emacs? Org-mode? Capturing notes to-read or facts from the web that I want to remember and automatically putting it into my drill sequence? Definitely not rote - deliberate, yes.