The problem is that there is so much to say about things, that I end up not bothering. I remember once in my childhood getting an excercise book and starting a journal. I included so much detail, including which roads we travelled when going on weekend day trips, that I eventually gave up.
The closest thing I have to a consistent journal/diary is my photo library, but I'm too lazy to annotate photos much. I should post to Flickr more, adding captions as I go.
Anyway, if you see boring, two line posts from me with the tag journal, and you'll know that I'm trying and you can just move on to the next post.