michael_nielsen

I use Anki (https://apps.ankiweb.net/  ), both desktop and mobile apps. I've no affiliation with them at all.

I mostly enter cards on the desktop app.

I review cards on the mobile app, while going for walks, in line at the coffeeshop, in transit, and so on. I find it meditative. It takes about 20 mins each day.

I tried (and failed) several times to take Anki up.

But what finally made Anki "take" was frustration that I'd never really learned the Unix command line.

For fun, I wondered if it might be possible to use Anki to essentially completely memorize a (short!) book on the command line. It was. I didn't memorize all options, but I did memorize nearly all I could imagine ever using. This was very exciting!

A caveat: there is a difference between remembering facts and mastering processes. It's one thing to know a command; it's another to actually type the command.

To really internalize a process, you need to actually do the process. Still, I've found the transfer relatively easy.