I dont really like talking about my OCD, because what worked for me, may not work for everyone, and as a therapist years later told me, we all have our own way of dealing with things, and I just managed to find my way. Everyone's case is different, just like their triggers, thoughts, compulsions, and spikes.
So... I've suffered from OCD and POCD for quite a large part of my life, and the only thing I found that helped, was just accepting it.
I'd spend hours, days in fact - arguing with OCD and the intrinsic system I'd built up to avoid things, I had to say key words, had to avoid things, had to do everything correctly and arguing only ended in tears. But of course nothing came close to when it developed, and POCD and violent thoughts came into play.
It was after I'd been sexually assaulted myself, I began questioning everything and OCD upped a notch. A murder story would come up in the paper about some girl murdered two towns away and I'd convince myself I'd somehow did it, perhaps I'd sleep walked, perhaps I'd done it and taken drugs? and the thought's - they flash in your mind, pictures of children, killing people, doing the worst things imaginable all there, in your mind.
It got to the point I was desperately trying to sleep to get rid of the constant onslaught of thoughts, the constant disgust I had with myself, I was so close to going back to drinking all the time and cutting.
But in the end... Razor blade in hand, I just decided I'd call OCD's bluff. I was ready to die anyway.. So in the end I just woke up one morning, and when the thought's telling me I was a terrible person came, I just said 'Ok, we will see' and when bad luck items, and rituals came along, I tried my best to avoid doing them.
Then of course, with bad luck/magical thinking it tells you, that you can't predict the bad luck, so maybe it will happen some other time, you'd better do the ritual now just to be sure.
But then I realized bad things happen anyway, I certainly wasn't happy in the state I was in, and I was going to kill myself anyway, so if bad luck happens, it happens. And slowly but surely after I'd began to become indifferent to the OCD the thoughts began to quell too, as did the images, I just kind of learned to deal with them. OCD would say ' you're a pedophile' I'd say 'Ok' because I'd gotten to a point, where I didn't care, I think I knew -somewhere deep down that I wasn't these things.
Because of course if you disagree there's always the 'how do you know' card, where you have to rationalize how you know this, and of course because you can never win with OCD, all logic goes out of the window, in place of far stretched idea's and perversions of the imagination.
I was also studying Buddhism at the time and that was when I began to realise the reality of karma, of rebirth and also meditation and metta meditation, which really helped to heal years of inner conflict and pain, and reading the Suttra about the man who thought his coat was bad luck, really emphasized things for me, and admitted I did put my faith in Buddhism.
I say admittedly, because I'm not sure studying the Dharma is best done when using it in that way, but then on the flip side I'm finally able to start re-piecing what's left of my life.
However i'm not cured though, and i'm not entirely sure I ever will be. Much like the story of the great mathematician John Nash, I just learned to deal with the thoughts. I still get them sometimes, not so bad anymore, but now when I do, I just nod and say ok, I don't give them food.
But again it's really like I said, OCD is such an invasive disorder and can completely ruin your life, so I am always cautious of saying how I got through the worst of mine. I just felt I'd give some breif info, and if it helps, great, if not I'm sorry for wasting five minutes of you life :)
Some links that might be of interest though - (they relate to Buddhism fighting OCD)
http://aeon.co/magazine/culture/how-buddhist-ritual-helped-me-ride-out-the-storm-of-ocd/
http://tinybuddha.com/blog/accepting-your-battles-how-struggles-can-be-gifts/
http://www.mattbieber.net/ocd-buddhism-vice-versa/
http://tinybuddha.com/blog/accepting-your-battles-how-struggles-can-be-gifts/
and lastly a search in r/Buddhism..
https://www.reddit.com/r/Buddhism/comments/2b3y93/buddhism_and_ocd_thoughts/