It's just basically me taking notes on the book that I'm currently reading (consciously limited this to 1 book at a time). I underline interesting things while I'm reading and then try to write up notes every weekend. This basically means that I go through the things I read again (some sort of spaced repetition), but this time I know what the interesting parts of it are already. Then it's just a case of going through them randomly some times over the week for more spaced repetition.

The implementation is just a bunch of markdown files in jekyll. (https://github.com/paramsingh/paramsingh.github.io)