Crushing goals does have a large part to do with waking up early, getting a fresh start to your day, but not necessarily does this have to do with a lack–of–sleep. If I had not woken up early all those times I decided to crush my goals, there would have been a lot of missed opportunities. Have I chosen to miss some opportunities on purpose just to sleep–in before? Yes, but those times I chose to sleep–in, I did have consequences and I did happen to miss some opportunities.
