Actually, I don't really own many material items that I'd die without. One or two sentimental items, yeah, but I barely own much anything around me. Borrowing too many things that will be left behind whenever Zeich and I move in. But let's see, in no particular order let's try this:
Cell phone. It's a comparatively "older" model to what most people have, and I don't actually call too many people, but it's pretty vital for me even for just the small things. I never feel quite right if I accidentally go out without it.
Notebook(s)/Notepad(s). Not sure if this counts, as I tend to toss out old ones after a while (usually after losing them for some time first and re-stumbling upon them later) and then get new ones. But I do a LOT of writing, sometimes to jot down game or story ideas, sometimes as a quick outlet for some creative steam, or sometimes just to make sense of my scattered thoughts. Kinda scary looking back over some of the pages sometimes, since I'm not the most stable of people. I just wouldn't be the same though if I didn't have any way of expressing myself on paper, even if no one else ever reads it.
My Zeich plushie. Everyone already knows I'm a sentimental, lovestruck furfag. Bite me.
Porn Computer. I don't feel right putting this on the list, as my own personal computer died a while back and I'm simply borrowing my parents old shitty computer until I either get off my ass and fix up my old one or get a new one for myself. But put bluntly, I doubt I can live without an internet connection. Just way too many online things that are a big part of my life, the online friends I made and the sites I visit on a regular basis. Especially you guys. <3
And fuck putting down a number five, I can't think of any more that aren't stupid or mundane things.