I have this little paradise of almost-finished poems: a file called "Completed Poems - Almost."
When I have time I draft like crazy, writing big, big, long, sloppy, inclusive first drafts. I let it all hang out. I run the idea into the ground. These drafts are raw material. I mark each of them "Draft 1" and print them out. They go together in an envelope marked with the approximate date of composition (such as "Fall 2007").
When there's another spot of time (at least six months later) I delete and toss the hopeless drafts. Those that still stand are so long & sloppy I can refine them simply by cutting. If after that I still care, I print these drafts out, mark them "Draft 2," and then the intensive crafting work begins.
When a poem is almost finished -- when it's whole except for, say, one nagging word, or one line, or a closing line -- it is promoted to the file "Completed Poems - Almost."
I visit this file with pleasant anticipation, when I have time, usually every six months or so. Often I can immediately see what the poem needs, supply it, and promote it to "Completed Poems." Those I print out and put in a binder.
A really sticky "almost-poem" I'll read aloud. My sense of embarrassment, boredom, or distaste tells me exactly where to apply my crafting efforts -- or whether any further efforts will be in vain.
Some drafts do hard time in that "Almost" file. But I like that file even better than "Completed Poems" (whose drafts are disposed of). A completed poem is satisfying, but the adventure of making it, the romance, the wild guesses, the risks, the faith, the Nikola-Tesla-like moments of revelation, the experimentation -- is so OVER.