You must find something you want to live for that's bigger than yourself - a mission - whether it's your children, a business, a non-profit, whatever. That pulls you to achieve, which is far more sustainable than to push yourself to. You can only push yourself for so long.
My name was given to me. I didn't just decide to change it one day. But I ran with it to reflect a more peaceful and positive attitude for my new Reincarnated project. The Snoop Dogg name is so connected to hip-hop, and I didn't want to change that. Hip-hop raised me, and I would never turn my back on it.