You might also check out spaced repetition software. I've started putting anything I want to remember for the long haul into org-drill, an SRS package for Emacs

You might also check out spaced repetition software. I've started putting anything I want to remember for the long haul into org-drill, an SRS package for Emacs, though Anki and Mnemosyne are more well known. I even schedule articles that I want to return to.