I suck at keeping journals, diaries, calenders, you name it. Got the wrong idea about diaries when I was younger and thought you had to write in them everyday, so I'd write in any old uninteresting thing to fill the spaces.
I don't bother anymore.
I did that too. I only did it because my goal was to write about my life, then after I finished a journal I would store it, and in the future I would read it just to see how I was like before and how my mind "worked"... even if it is emberassing.