This one, however is less likely (?) to be interesting to anyone other than me though. It's a simple diary of what I do at work each day.
Matt Lacey: Wot I've Done Today
I find it useful as I'm very good at forgetting, plus it prompts me to think about what I actually get done each day.
I also find it useful to look at it in combination with my Twitter account to get a more complete picture of how I've spent my time. (It's a nice theory but I'm very good at forgetting to twit though, so my life looks a lot less busy than it is.)