I keep thinking about this, and I realise that I generally like my poems in a heap. I like finding them and rediscovering them by accident.
All my poetry volumes have bookmarks in them, and when a poem strikes me, I take one bookmark and move it there. I don't even shelve them alphabetically; I remember what the books look like.
If I want to get some insight into how a poet's work changed over time, I might organise them by date they were written/published.
In my entry in the Absolute Poets' Collections thread, I list the links by thread or subforum. I might note whether a form was used. But generally, I seem to resist organisation.
That probably reflects my approach to reading poetry: I usually don't go looking for, say, love poems, or poems about war. It's not the topic, but a key phrase that I'll want to recall.
It might just mean that I don't read or write enough of it. And I certainly don't mean that my way is best; it might be crap. But sometimes it helps me to think of entropy as a way to ensure that I'll keep rediscovering old favourites. Otherwise, I might never revisit a poem that didn't hit me years ago, but does now.