Do you know that we're creature of habits? We tend to do the same things the same way on and on.
If we have a bad habit, we'll keep on doing it even if we know it's bad. We'll create the reason to keep doing it. We even end up thinking our bad habits are good ones. And if we want to create a new good habits (or a bad one) we only need 27 days.
Yes, if we keep on doing it everyday for 27 days, it will become an habits.
How about creating a good habits? And how about removing a bad one?