I think that can be simplified to "Instead of focusing on getting rid of your OCD, focus on something else. Because by focusing on getting rid of your OCD, you're actively focusing on your OCD."

I couldn't quit cigarettes by focusing on quitting, coz I was just sitting there think I can't have a smoke all day. Coz I was focusing on it I wanted one more. Whereas if I went and did something all day I could get through without even craving one the entire day.