well, I've been collecting the mangas as I've been able to get them. The rest of what I've collected it fairly small. I have 2 cell phone straps, the japanese 2005 calendar, a few pencilboards, and lots of digital pictures.
Other than the anime music videos, I've made some wallpapers and avatars.
What I really want is to get my hands on some of the more rare collectibles, like the bun steamer, tea set, the kouzen necklace, and a set of the UFO Plushies. The latter you can get off ebay, but I'm not in the mood to pay $50 for each one.