Reward your self. When I was a kid my dad used to pay me 5 cent a by a page and 1 birr per book. If I was to buy something extra (like a ball or something) I have to read the price. First I was reading for the money but then I didn't care. Nevertheless to say I read over 1000 books and I'm just 24 years old. Find your reward for yourself. It doesn't have to be something big.