Ask HN: How do you manage your bookmarks?

I've recently tried to find something I know I bookmarked a couple of years ago, and failed miserably - my tags are not consistent, I don't remember the title words, can't find the same page with google, and I have hundreds of bookmarks per year (going back two decades now) which makes it infeasible to look at each of them, even if I narrow down based on titles.

There must be a better way; delicious / ymarks / etc do not seem to be helpful except to keep devices insync and to share/discover new sites.

How do you manage your bookmarks? Or actually, since bookmarks probably aren't the right solution, how do you manage your external memory of the web?