I started Exhale by sharing my very first exhale experience when I realised that my life - and especially my work / business - felt like I was pushing a rock up the hill.<...> That sensation and the fact that I had become unhappy and tired in doing so, was my obstacle.
Where I am today, I'd very much like to avoid that sensation of feeling I have to persist and persevere with something that isn't enjoyable, isn't working and likely making me unhealthy (mentally, emotionally and / or physically).
Instead I've tried to be more aware of when obstacles do pop up and having a perspective about that. I've mostly stopped trying to overcome obstacles and challenges, and have tried to find alternative routes to get to where I'd like to go.
Read The Obstacle is the Way by Ryan Holiday.