[tunesmith]

I use DevonThink as mostly just a clipping/storage app, but it has tons of utility beyond that - seems a lot of grad students use it for managing resources they later write papers from. I chose it over Evernote because it does more. The main downside of it is that it doesn't yet have a good mobile syncing solution, even though they've been working on it for years now. But it has a ton of UI customizability for searching and browsing, and search works well too.

The main problems with all these systems are just that we use them to attempt to augment our own intelligence/utility based off of some concept of who we are aiming to be in the future, and then as things change for us personally, our aborted plans lead to a lot of rot that doesn't clear itself away automatically. So only some small percentage of what we collect ends up relevant.

I have a lot of individual Anki decks, which isn't recommended. But I create a filter deck that rebuilds from the other decks every day and properly randomizes the cards, and only study from that. I do it every day except when I forget and then I catch up later. My cards are mostly along the lines of music, logic, math, stats, programming, and rational thinking.