I have been blogging on livejournal since May 16th 2005. When I started clearing through my things last year, i realized that I wrote in private notebooks throughout university about study, religion, friends, relationships. I wrote throughtout my gap year in Sri Lanka, and before that during A-levels. Then I found scrapbooks I had made about trips to Norway in 1987 (International Scout camp) and a school exchange trip to Hannover in 1988. And then I found the christmas diaries my Mum encouraged us to write as children, the first one was dated 1978 (I was 5!) and we wrote every day and drew a picture.
But my reckoning, that's 36 years of journalling, on and off :-)