I don't keep a journal, per se, but I do have a daily record of what I eat, when I eat it, my mood when I eat, carb/protein/fruit exchanges involved, and a few other things like medications, weight, exercise, whether I have my period, etc. It generates the food journal I take to my nutritional counselor, the mood and medication record that my pdoc gets, and the period record that my OB/GYN gets.

It also reminds me of things like whether "forgetting" a med for a day or so has any impact on my mood, how my weight affects my mood, etc.

Yes, it does rather encourage my AN, although that's not the point of it. It's hard to eat more, no matter if I've reached my goals or not for the day, when I see how much is already listed. But it's there to try to help me reach my goals, and some days it does.