This is a common occurrence with exercise and healthy eating regimes. Particularly so in the gym, as often people join because they feel it it's the 'right thing to do', along with wishing people they haven't spoken to for ages 'happy birthday' on Facebook and agreeing to work overtime on top of an already hectic schedule.
What do you think the purpose of education is? If you agree things need to change, what will you do about it? Whether you're a headteacher or a class teacher, at any stage of education, whether you're a parent, or a pupil, you have the power to make a difference in the small daily deliberate actions you take.
Habits are what dictate your behaviour and if you learn to put the right ones in place, you'll succeed in any goal you set yourself. No, it won't happen overnight. No, it won't be easy. But yes, it will make you succeed. Yes, it will make you move forward. Yes, it will help you reach your goals and your dreams. And why wouldn't you want that?