Even the Wikipedia page on "evidence-based learning" only discusses three things: spaced repetition (Anki), n-back training and some weird ambiguous behavioral thing called errorless learning.
I've also continually scoured HN and Reddit for tips.
Does anyone have any hidden knowledge to share? My current experiment is a tweak of memory palaces. I take a route in my city that I know well, that I can picture myself traversing. I then mark monuments on the path. I then mentally attach items to the path. Finally, I take a screenshot of the path and manually label each milestone with the associated piece of information.
So far I've managed to memorize 19 items related to Javascript proxies this way, after a single session.