Ask HN: What do you use for personal document management and archival?

Recently, I have reached the point in one's life where the various important documents one has to keep for one reason or another have begun to pile up. Until now, they've been few enough in number to not require any particular form of management and any risk of losing papers while moving was small. Slowly but surely they've become more cumbersome to deal with, which has lead me to look into some kind of digital document management. The idea of scanning, indexing, and discarding all except a handful of things where the original physical copy matters is appealing.

I've heard some people use Evernote for this purpose, but the idea of entrusting what will eventually accumulate into vast amounts of sensitive documents to a third-party cloud service which is used by many others for the same purpose doesn't sit too well with me. It's just too juicy of a target. Evernote is also "less than svelte" and it seems less than wise to lock all of that up behind a closed source service that could easily go belly up or otherwise lock me out.

So this leads me to the question in the title. What do people here use for this kind of thing?