Anyway, I figured it out! And now ALL of my poems are indexed, as are all of my bar napkin cartoons, all of my poems (subdivided into subway, current events, office, and words), and all of my religion posts. It's a pain doing all of it retroactively, so while there's also been other index labels (like pictures and games), those are only for the last 200 posts, not the whole past sixteen months.
And post 500 seems as good a time as any to announce that I've decided I really WILL start a second website just for cartoons and poems, on the theory that it's the single-minded sites that have actual fans and traffic. Sites like The Comics Curmudgeon and Cute Overload each do one thing and do it well. If xkcd can write comics that attract the attention of Wil Wheaton, surely I can get a fanbase going as well. My brother the computer whiz has put the site together, and now all I need is content---which means I have to buy a scanner. So it might be a few days or even weeks. But at least my intention has now been officially announced. Gee, but it's a thrilling day here.