The only way I know is to very slowly and systematically wipe away these behaviors. You would need to start in the very possible lowest feared situation and give yourself a target of not doing _____ behavior. You're entire goal for that assignment is not to give in to that behavior. As you keep at this, you'll slowly break down the behavior so it wont be automatically. But it is crucial to start in as lowest feared of a situation as you can and build slowly. If you're not able to do it, you probably need to find an easier situation.