It takes personal discipline to not think about them or let them effect your daily life. Just like eating right. You know the things you shouldn't be eating and when you do eat something that you shouldn't, then you try harder the next time to avoid it.
Same idea with your thoughts. If this poison comes up, banish it from your mind. Find something else to occupy yourself. And don't allow yourself to go back there again. Yes, easier said than done, but practice makes perfect.
Try little bits at a time. Say to yourself, "I won't think about that for one day." Then I won't think about that for two days.
And you know, that would include not posting about it either.
We need some new subjects to post about. New discussion topics. I'll be thinking. Gotta run for now.