“It is critical to realize that every habit that you have began as a choice that, through consistent repetition, has become a habit.” from the book The Power of Changing Your Habit http://www.amazon.com/Power-Changing-Habits-Guide-ebook/dp/B007YLY4PA
Ever notice how easy it is to get a bad habit and how hard it is to break that bad habit, however, it is hard to create a good habit but it is really easy to break a good habit? Habits don’t just go away, they need to be fed with new stuff or they simply return. If you go to the Bible there is a scripture which says that if a person casts out a demon and cleans their house (referring to their inner spirit), that demon will go away for a season and find 7 other uglier and nastier demons than itself and return back to the place where it used to reside. If that demon and his friends come back and find a clean empty house, they will invade and take over, however if that person has filled that void with something else, there will be no room for those demons to move in.
with habits it is the same thing. We need to fill the void of a bad habit with a good habit and we cannot let up on that habit ever, because if we do that bad habit will return with a vengeance and worse than before.