I have got purely obsessional OCD. What this means is a thought enters my mind--usually something negative--and doesn't leave. I end up having to think about it 5000 times a day, and once this starts, my life is ruined for a week, two weeks, a month, or six months. I'd tried a lot of different ways to get rid of this problem: therapy, medication, meditation... Nothing ever worked, until I read an article that said the people who had this problem had an overly active imagination, and it would help if they channeled it into something productive, like writing.