This is the definition of success, It is said that you need to do something at least 30 times to create a new habit. For changes in life long learnt behaviors it can take far more than that. For example have you ever got in the car and driven to your destination, and not really remember the journey there. You have been driving using the learned behaviors of your subconscious mind, and your conscious mind has been thinking about something else. However if you were to drive in a different country whose custom is to drive on the other side of the road ? your conscious mind would be working very hard to correct the learned and instinctive behavior of your subconscious mind. In fact the whole experience of driving on the other side of the road feels wrong and uncomfortable, and if you lose your concentration you could find yourself automatically going back to familiar patterns and become a road hazard!