Back in May, I started keeping a little writing journal. Not a journal that I use for writing, but rather, I journal I keep that keeps track of my writing.
Essentially, on days that I write (or, if I happen to forget to update it, after a couple of days of writing), I just make a short entry that goes over what piece or pieces I might have worked on and how I felt about the project(s) in question. I'll also make notes if there's something I should be working on that I haven't gotten around to (yet or recently).
Mostly, I guess I'm using it to keep track of myself, making sure that I'm writing as much as I might like, and checking to see if the time I do write are productive and/or enjoyable. In a way, I suppose it's like one of those journals that dieters keep in order to keep themselves motivated.
We'll see how it works, in the long term.