Staying motivated can be one of the hardest parts of creating a career that really lights you up. It's not an overnight, push-button process. It takes time and effort for it to unfold, and it's really easy to stray off the path, especially if you're doing it alone (versus working with someone like me).
Taking a look at what motivates you and building that into your process can help. What motivates you? Is it competition? Is it somehow keeping score? Is it rewarding yourself for your efforts?
So what is your motivation to run? to run well?
Do you have a race in mind?
What is your short term goal?
What is your long term goal?