I've started using Anki for this. It's basically flash cards that are shown to you at increasing intervals in order to keep it fresh in your memory. It's made t

I've started using Anki for this. It's basically flash cards that are shown to you at increasing intervals in order to keep it fresh in your memory. It's made the HN front page a few times over the last year. https://apps.ankiweb.net/ https://apps.ankiweb.net/