Agreed. It's a good way to know how much you can write and what time to put aside to write something.

I have fanfiction.net for a general idea of what order I wrote in (for the earlier stuff at the very least) but not for dates as much. *shrugs* And I know my first Firefly fic was Unspoken Promise (http://xfirefly9x.livejournal.com/1450.html) (Mal/Inara). I played with some Jack/Kate (Lost) before that but never finished any of it so I don't tend to count that. It's much more organised now though with adding dates. (I just put the finish date on mine since they're so short.)