One thing you might also want to do is make flashcards in a Spaced Repetition app like https://apps.ankiweb.net/ https://apps.ankiweb.net/ about the edge cases

One thing you might also want to do is make flashcards in a Spaced Repetition app like https://apps.ankiweb.net/ https://apps.ankiweb.net/ about the edge cases of CSS. You might also http://book.mixu.net/css/ http://book.mixu.net/css/ a useful guide to go through while building these. But as far as deliberate practice, I think it is a good idea, but don't have a good set of pages to try imitating.