First of all, you´re not lazy, you just can't find any motivation or challenge in what the world offers. I read a book called Alkuajatus (it's Finnish for the original thought) and according to it we forget our own original thought since we learn (and often are forced to) to live our life based on outer thoughts. This original thought, the original will, is something everyone has, but it has been more or less forgotten. The book describes how you find your own true will and it's the only thing that gives you the satisfaction and challenge you long for.
I have managed to reveal a lot of outer thoughts that I had, and as I grew more conscious of my own will, my motivation grew instantly. Alkuajatus really works, I recommend you find out more. The book can be found in 3 languages, also English, and the English title is Alkuajatus - The Original Thought. You can find out more about it on google. Good luck!