I've decided to do it digitally. I carry a flash drive with me and have two documents, both are password protected.
I'll make regular backups and may or may not have it printed. It's very personal. I want my Children to have it when I'm gone. One Document is like a brief history of me from Childhood to present. It's amazing as I type what I remember. The other wlll be day to day, Whatever's on my mind, Things that are going on, very free form. This works for me because I have terrible handwriting and can type very fast. Spellcheck is a plus, and I'm no longer married, so it keeps it private....