Q.) HOW TO STOP ONESELF DOING THE ROUTINES

A.) Actually it's funny the wording you used because that's the answer for this tactic. Say "STOP!" to yourself and tell yourself what ritual you are doing and why you are doing it. When you express it and get it out of your head, it will help to show your brain that it is truly ridiculous. Some people have actually found that this one tactic alone destroyed one of their OCD's.