Willpower is not the master of destiny.  Rather the power of habit is like the effect of water dripping on a rock.  Our habits quietly shape us. Understanding this principle empowers us to align our habits with strategies to accomplish our goals and improve our lives. The habit cycle of trigger-craving-response-reward is set in motion by subtle clues in the environment.   Location, time, preceding event, emotional state and other people are all strong influences which set the habit cycle in motion.   Learn more about this by Googling authors Marshall Goldsmith, James Clear or Charles Duhigg.