I think that maybe when you read my response, you'll realise that I'm the weird one!
I kind of keep a journal. I found that when I was having problems, keeping a journal would make it worse, because reading over what I had written kinda reinforced what had been going wrong, and didn't help at all.
So I recently reached a compromise on the whole journal-keeping idea. These days, I only write about the good stuff that's happened. That way, when I do have a bad day, I get my journal out, read about the good stuff that's been happening in my life, and it makes me realise that things aren't as bad as I first thought.
"Poetry and Hums aren't things which you get, they're things which get you. And all you can do is to go where they can find you."