It doesn't matter how old the person is. If you can identify the cue and the reward, and understand what's driving the behavior from a neurological perspective, the craving. Then you can change that behavior. But you have to be deliberate about it.

The conclusion of Charles Duhigg in an interview about the research he did for his book The Power of Habit. Professional self-managed teams empower their organizational culture and purpose by consciously steering their daily habits.