[paulsutter]

My email from 1982 was a pretty good journal of my high school life and work (I was a programmer).

Today my text messages are a good journal of my personal life, email a good journal of my work, and my Facebook timeline a good journal of my interests (I post news I find really interesting).

Those are all "implicit" journals but they work pretty well. I can "relive" the financial crisis by reading my facebook timeline.

If you want a pure, deliberate journal, today that would take the form of a blog. I wonder how many people still keep a private, deliberate journal along the lines of an old school diary. Interesting survey maybe.