It's what I do, I fill in things like that for myself, and I get a bit obessional about it, and I end up feeling guilty if I don't fill it in, such as a mood diary for my bipolar, it got to the stage where the diary itself was putting me in a bad mood because if I went to bed at night, and I'd forgotten to rate my mood that day, I'd feel guilty about it, then I'd feel angry with the diary. But otherwise, it's probably a good idea.