Every single successful person I've ever spoken to had a turning point and the turning point was where they made a clear, specific, unequivocal decision that they were not going to live like this anymore.
Alice in Wonderland Mad Hatter: Would you like a little more tea? Alice: Well, I haven't had any yet, so I can't very well take more. March Hare: Ah, you mean you can't very well take less. Mad Hatter: Yes. You can always take more than nothing.