Actually, the first step is easy: slow down!
Really, that's how it all starts to change. Then, spend some time setting a big, crazy, ridiculous goal.
Suddenly, running has meaning. Sure, it's still hard sometimes, but once you have a goal that's pulling you forward, then you have a reason to keep going.
And once you start making just a little bit of progress on that goal—whether it's a certain race distance, a fast time, or losing a few (or a lot of) pounds—then your entire mindset starts to shift, and you realize the sky is the limit.
For me that meant becoming a marathoner, eventually qualifying for Boston, and finally getting into ultramarathons and even running 100 miles at once.
And I know you won't believe me when I say you could do all of that stuff too... but really, I think it's true.
I wasn't any good at running when I started. Never a great athlete. But I fell in love with it, kept putting in the miles, and amazing things happened.
You can do the same.