Besides the typical concerns about pain, I'm not particularly worried about it. I do what I can to avoid it, and I do what I can to leave my mark. As long as I can finish my degree and leave that mark, I'll be fine. Also, the neat thing about permanently losing consciousness is that you can't actually experience it. I find it plausible that our experience of death will be asymptotic - always approaching that final moment but never actually reaching it.