Since there were some posts on the topic, I just have to say how much easier things were before everything was on computer. Yes, some things were a pain to file, store, and find, but with a decent home filing system, the marriage certificate could have been much easier to find. Though things like that that I've scanned, I've always filed the original somewhere.
My dad had a nephew who was an attorney, and he took care of a lot of Mom and Dad's legal stuff when they each died. I'm sure it'll be much more difficult for my daughter when my husband and I die. We have a will and some basic instruction, but there's really a whole lot more we need to do.