Flashcard tools like Anki and Tinycards are nice, but they lack enough readily available content to be really useful. Anyone with the expertise and perspective

Flashcard tools like Anki and Tinycards are nice, but they lack enough readily available content to be really useful. Anyone with the expertise and perspective to use these tools in a practical time frame to assemble a deck of the many thousands of words necessary to achieve mastery doesn't need the tools. For tools like anki, you don't want to use someone else's deck in the first place, because making cards is a learning process in itself, which will improve retention.