I’ve done this (sort of) and I just wanted to let everybody know that it is worth the agony of working on it. I think it’s been about 6 months for me now, and about 6 months before that, and before that it was every day for many many months, so I’d say I’ve pretty much stopped. My advice is to take it one time period at a time (I’d say one day, but sometimes it’s just one minute) and don’t beat yourself up over it when you do.