What pain do you want to experience?
You can either: Experience the pain of your poor choices, suffering from poor mental and physical health, sitting around knowing you could have done something better but you didn't or you can experience the pain of training, and the mental discipline of the work you know you need to do, especially when you dont feel like it. If you have been slacking, and you need to find some new direction, ask yourself: What pain do you want to experience?