It's a challenge to start a business, but there is often so much excitement and passion that there is enough momentum to continue the acceleration.
In my experience, the wheels can start to fall off when leaders begin trying to scale-up without first doing the work on their own leadership that will allow them to be successful through the scaling process.
Success starts and ends with mindset. I enjoyed talking with Bill Gallagher, a scaling master coach, on his podcast -- Scaling Up Business.